/* roulang page: index */
:root {
            --color-primary: #20232A;
            --color-accent: #00C896;
            --color-accent-warm: #F59E0B;
            --color-bg: #F5F7F8;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #4B5563;
            --color-text-muted: #7B8794;
            --color-border: #E4E7EB;
            --color-accent-light: #EAFAF5;
            --radius-card: 12px;
            --radius-button: 10px;
            --shadow-card: 0 1px 3px rgba(32,35,42,0.06);
            --shadow-card-hover: 0 6px 16px rgba(32,35,42,0.12);
            --transition: all 0.2s ease-in-out;
            --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--color-accent-warm);
            text-decoration: none;
            outline: none;
        }
        a:focus-visible {
            outline: 3px solid rgba(0,200,150,0.45);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }

        button,
        .button {
            cursor: pointer;
            font-family: inherit;
            font-size: 14.5px;
            font-weight: 600;
            border-radius: var(--radius-button);
            transition: var(--transition);
            border: none;
            padding: 0.75rem 1.6rem;
            line-height: 1.6;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.02em;
        }
        button:focus-visible,
        .button:focus-visible {
            outline: 3px solid rgba(0,200,150,0.45);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        .section-padding {
            padding: 4rem 0;
        }
        .section-padding-sm {
            padding: 2.5rem 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 0.75rem;
        }
        .section-label::before {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-text);
            margin: 0 0 1rem;
            letter-spacing: -0.01em;
        }
        .section-title .highlight {
            color: var(--color-accent);
        }

        .section-subtitle {
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text-secondary);
            margin: 0 0 2.5rem;
            max-width: 780px;
        }

        .text-muted {
            color: var(--color-text-muted);
        }
        .text-accent {
            color: var(--color-accent);
        }
        .text-warm {
            color: var(--color-accent-warm);
        }
        .mono {
            font-family: var(--font-mono);
            font-size: 0.9em;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12.5px;
            font-weight: 600;
            padding: 0.3rem 0.75rem;
            border-radius: 999px;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            letter-spacing: 0.04em;
            white-space: nowrap;
        }
        .badge-warm {
            background-color: #FEF3C7;
            color: #B45309;
        }
        .badge-dark {
            background-color: var(--color-primary);
            color: #fff;
        }

        /* Header / Navigation */
        .site-header {
            background-color: var(--color-primary);
            height: 64px;
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--color-accent);
            box-shadow: 0 2px 8px rgba(0,0,0,0.12);
        }
        .site-header .toolbar-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 1.25rem;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            text-decoration: none;
            transition: var(--transition);
        }
        .nav-logo:hover,
        .nav-logo:focus {
            color: var(--color-accent);
            text-decoration: none;
        }
        .nav-logo .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            flex-shrink: 0;
        }
        .nav-center {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            flex: 1;
            justify-content: center;
        }
        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 13.5px;
            font-weight: 500;
            color: #D1D5DB;
            padding: 0.5rem 0.7rem;
            border-radius: 8px;
            transition: var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }
        .nav-item i {
            font-size: 13px;
            color: #9CA3AF;
            transition: var(--transition);
        }
        .nav-item:hover,
        .nav-item:focus {
            color: var(--color-accent);
            background-color: rgba(255,255,255,0.05);
            text-decoration: none;
        }
        .nav-item:hover i,
        .nav-item:focus i {
            color: var(--color-accent);
        }
        .nav-item.active {
            color: var(--color-accent);
            background-color: rgba(0,200,150,0.1);
        }
        .nav-item.active i {
            color: var(--color-accent);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 0.9rem;
            flex-shrink: 0;
        }
        .status-dot {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12.5px;
            font-weight: 500;
            color: #D1D5DB;
        }
        .status-dot .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.3); }
        }
        .nav-bell {
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            color: #D1D5DB;
            background-color: transparent;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-bell:hover,
        .nav-bell:focus {
            background-color: rgba(255,255,255,0.08);
            color: var(--color-accent);
            outline: none;
        }
        .nav-bell .bell-dot {
            position: absolute;
            top: 6px;
            right: 6px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background-color: var(--color-accent-warm);
            border: 1.5px solid var(--color-primary);
        }
        .nav-cta {
            background-color: var(--color-accent);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius-button);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .nav-cta:hover,
        .nav-cta:focus {
            background-color: #00B386;
            color: #fff;
            outline: none;
            box-shadow: 0 0 0 3px rgba(0,200,150,0.45);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 22px;
            cursor: pointer;
            padding: 0.4rem;
            border-radius: 6px;
            transition: var(--transition);
        }
        .hamburger:hover,
        .hamburger:focus {
            color: var(--color-accent);
            outline: none;
            background-color: rgba(255,255,255,0.06);
        }
        .mobile-nav-panel {
            display: none;
            background-color: var(--color-primary);
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 0.75rem 1.25rem 1.25rem;
        }
        .mobile-nav-panel .nav-item {
            display: flex;
            width: 100%;
            padding: 0.7rem 0.8rem;
            font-size: 14px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .mobile-nav-panel .nav-item:last-child {
            border-bottom: none;
        }

        /* Hero */
        .hero-section {
            background-color: var(--color-primary);
            background-image: url('/assets/images/b28acbcef76928ee.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            padding: 5.5rem 0 4rem;
            min-height: 680px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(32,35,42,0.95) 0%, rgba(32,35,42,0.78) 45%, rgba(32,35,42,0.5) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            background-color: rgba(0,200,150,0.1);
            border: 1px solid rgba(0,200,150,0.3);
            padding: 0.4rem 1rem;
            border-radius: 999px;
            margin-bottom: 1.5rem;
            letter-spacing: 0.04em;
        }
        .hero-title {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin: 0 0 1.25rem;
            letter-spacing: -0.02em;
        }
        .hero-subtitle {
            font-size: 16px;
            line-height: 1.9;
            color: #D1D5DB;
            margin: 0 0 2rem;
            max-width: 640px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .btn-primary {
            background-color: var(--color-accent);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 0.8rem 1.8rem;
            border-radius: var(--radius-button);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.02em;
            text-decoration: none;
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background-color: #00B386;
            color: #fff;
            outline: none;
            box-shadow: 0 0 0 3px rgba(0,200,150,0.45);
            text-decoration: none;
        }
        .btn-outline {
            background-color: transparent;
            color: var(--color-accent);
            font-size: 15px;
            font-weight: 600;
            padding: 0.8rem 1.8rem;
            border-radius: var(--radius-button);
            border: 1px solid var(--color-accent);
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.02em;
            text-decoration: none;
        }
        .btn-outline:hover,
        .btn-outline:focus {
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            outline: none;
            text-decoration: none;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            align-items: center;
            font-size: 13px;
            color: #9CA3AF;
        }
        .hero-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-meta .meta-item i {
            color: var(--color-accent);
        }
        .hero-visual {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-visual-panel {
            background: rgba(255,255,255,0.06);
            backdrop-filter: blur(2px);
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: 16px;
            padding: 1.5rem;
            max-width: 520px;
            width: 100%;
        }
        .hero-visual-panel .panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1rem;
            color: #D1D5DB;
            font-size: 13px;
        }
        .hero-visual-panel .panel-header .dots {
            display: flex;
            gap: 6px;
        }
        .hero-visual-panel .panel-header .dots span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: #4B5563;
        }
        .hero-visual-panel .panel-body {
            display: grid;
            gap: 8px;
        }
        .hero-visual-panel .panel-body .line {
            padding: 0.6rem 0.8rem;
            background: rgba(255,255,255,0.05);
            border-radius: 8px;
            color: #D1D5DB;
            font-size: 13px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-visual-panel .panel-body .line i {
            color: var(--color-accent);
            font-size: 12px;
        }

        /* Quick download strip */
        .quick-download-strip {
            background-color: var(--color-card);
            border-bottom: 1px solid var(--color-border);
            padding: 2rem 0;
        }
        .version-card {
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            transition: var(--transition);
            height: 100%;
        }
        .version-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--color-accent);
        }
        .version-card .vc-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .version-card .vc-date {
            font-size: 12.5px;
            color: var(--color-text-muted);
            font-family: var(--font-mono);
        }
        .version-card .vc-download-btn {
            margin-top: auto;
            background-color: var(--color-primary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
        }
        .version-card .vc-download-btn:hover,
        .version-card .vc-download-btn:focus {
            background-color: var(--color-accent);
            color: #fff;
            outline: none;
            text-decoration: none;
        }

        /* Cards general */
        .card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            transition: var(--transition);
            height: 100%;
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 1rem;
        }
        .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 0.5rem;
            line-height: 1.4;
        }
        .card-text {
            font-size: 14px;
            line-height: 1.75;
            color: var(--color-text-secondary);
            margin: 0;
        }

        /* Scene demo */
        .scene-demo {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.75rem;
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }
        .scene-demo:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .scene-demo img {
            width: 100%;
            height: auto;
            border-radius: 10px;
            margin-bottom: 1rem;
        }
        .scene-demo h3 {
            font-size: 18px;
            font-weight: 600;
            margin: 0.5rem 0 0.4rem;
            color: var(--color-text);
        }
        .scene-demo p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.8;
            margin: 0;
        }

        /* Data strip */
        .data-strip {
            background-color: var(--color-primary);
            padding: 3rem 0;
        }
        .data-item {
            text-align: center;
            padding: 1rem;
        }
        .data-number {
            font-size: 34px;
            font-weight: 700;
            color: var(--color-accent);
            font-family: var(--font-mono);
            line-height: 1.2;
        }
        .data-label {
            font-size: 13px;
            color: #9CA3AF;
            margin-top: 0.4rem;
        }

        /* Social proof */
        .testimonial-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.25rem;
            height: 100%;
            transition: var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .testimonial-card .quote {
            font-size: 13.5px;
            line-height: 1.8;
            color: var(--color-text-secondary);
            margin: 0 0 0.75rem;
        }
        .testimonial-card .quote-author {
            font-size: 12.5px;
            font-weight: 600;
            color: var(--color-text);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .testimonial-card .rating {
            color: var(--color-accent-warm);
            font-size: 13px;
            margin-bottom: 0.5rem;
        }

        /* Comparison */
        .compare-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            height: 100%;
            transition: var(--transition);
            position: relative;
        }
        .compare-card:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .compare-card.recommended {
            border-color: var(--color-accent);
            border-width: 2px;
        }
        .compare-card .compare-badge {
            position: absolute;
            top: -10px;
            right: 16px;
            background-color: var(--color-accent);
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            padding: 0.2rem 0.7rem;
            border-radius: 999px;
            letter-spacing: 0.04em;
        }
        .compare-card .cc-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 0.75rem;
            letter-spacing: -0.01em;
        }
        .compare-card ul {
            list-style: none;
            margin: 0 0 1.25rem;
            padding: 0;
        }
        .compare-card ul li {
            font-size: 13.5px;
            color: var(--color-text-secondary);
            padding: 0.45rem 0;
            border-bottom: 1px solid var(--color-border);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.6;
        }
        .compare-card ul li:last-child {
            border-bottom: none;
        }
        .compare-card ul li i {
            color: var(--color-accent);
            font-size: 13px;
            margin-top: 3px;
            flex-shrink: 0;
        }
        .compare-card ul li.not-included i {
            color: #D1D5DB;
        }

        /* News cards */
        .news-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            height: 100%;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .news-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .news-card .news-date {
            font-size: 12.5px;
            color: var(--color-text-muted);
            font-family: var(--font-mono);
        }
        .news-card .news-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.5;
            margin: 0;
        }
        .news-card .news-excerpt {
            font-size: 13.5px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            margin: 0;
            flex: 1;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            margin-bottom: 1rem;
            overflow: hidden;
            background-color: var(--color-card);
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-accent);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.25rem;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            gap: 1rem;
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question .faq-toggle {
            font-size: 13px;
            color: var(--color-text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(180deg);
            color: var(--color-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-in-out, padding 0.3s ease-in-out;
            padding: 0 1.25rem;
            color: var(--color-text-secondary);
            font-size: 14px;
            line-height: 1.85;
            background-color: #FAFBFC;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0.9rem 1.25rem 1.25rem;
        }

        /* Steps */
        .step-item {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            padding: 1.25rem;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            margin-bottom: 1rem;
            transition: var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateX(2px);
        }
        .step-number {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background-color: var(--color-accent);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-family: var(--font-mono);
        }
        .step-content h4 {
            font-size: 15.5px;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 0.3rem;
        }
        .step-content p {
            font-size: 13.5px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* Compatibility tags */
        .compat-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 0.6rem 1.2rem;
            border-radius: 999px;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text-secondary);
            margin: 0.4rem;
            transition: var(--transition);
        }
        .compat-tag:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            box-shadow: var(--shadow-card);
        }
        .compat-tag i {
            color: var(--color-accent);
            font-size: 12px;
        }

        /* Changelog */
        .changelog-item {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            padding: 1.25rem;
            background-color: var(--color-card);
            border-left: 3px solid var(--color-accent);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            margin-bottom: 1rem;
        }
        .changelog-version {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-accent);
            font-family: var(--font-mono);
            flex-shrink: 0;
            min-width: 80px;
        }
        .changelog-detail {
            font-size: 13.5px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        /* Brand intro */
        .brand-intro-section {
            background-color: var(--color-card);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .brand-intro-text {
            font-size: 15px;
            line-height: 2;
            color: var(--color-text-secondary);
            max-width: 900px;
        }
        .brand-intro-text p {
            margin-bottom: 1rem;
        }

        /* Guarantee strip */
        .guarantee-strip {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
        }
        .guarantee-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 0.75rem 0;
            font-size: 14px;
            color: var(--color-text-secondary);
        }
        .guarantee-item i {
            color: var(--color-accent);
            font-size: 16px;
            margin-top: 4px;
        }

        /* CTA section */
        .cta-section {
            background-color: var(--color-primary);
            padding: 4.5rem 0;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 1rem;
        }
        .cta-section p {
            font-size: 15px;
            color: #D1D5DB;
            margin: 0 0 2rem;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.85;
        }
        .cta-section .btn-primary {
            font-size: 16px;
            padding: 0.9rem 2.2rem;
        }
        .cta-section .cta-secondary-link {
            display: inline-block;
            margin-left: 1rem;
            font-size: 14px;
            color: #9CA3AF;
            text-decoration: none;
            transition: var(--transition);
        }
        .cta-section .cta-secondary-link:hover,
        .cta-section .cta-secondary-link:focus {
            color: var(--color-accent);
            text-decoration: none;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            color: #D1D5DB;
            padding: 3.5rem 0 2rem;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 13.5px;
        }
        .site-footer .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-footer .footer-brand .logo-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
        }
        .site-footer .footer-desc {
            color: #9CA3AF;
            font-size: 13px;
            line-height: 1.8;
            max-width: 300px;
        }
        .site-footer .footer-heading {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }
        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer ul li {
            margin-bottom: 0.5rem;
        }
        .site-footer ul li a {
            color: #9CA3AF;
            font-size: 13px;
            text-decoration: none;
            transition: var(--transition);
        }
        .site-footer ul li a:hover,
        .site-footer ul li a:focus {
            color: var(--color-accent);
            text-decoration: none;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            font-size: 12.5px;
            color: #6B7280;
        }
        .site-footer .footer-bottom a {
            color: #6B7280;
            text-decoration: none;
            transition: var(--transition);
        }
        .site-footer .footer-bottom a:hover,
        .site-footer .footer-bottom a:focus {
            color: var(--color-accent);
            text-decoration: none;
        }

        /* Fixed bottom bar */
        .fixed-bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background-color: var(--color-primary);
            height: 56px;
            z-index: 99;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 1.5rem;
            border-top: 1px solid var(--color-accent);
            box-shadow: 0 -4px 16px rgba(0,0,0,0.15);
        }
        .fixed-bottom-bar .fbb-text {
            font-size: 13.5px;
            color: #D1D5DB;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .fixed-bottom-bar .fbb-text i {
            color: var(--color-accent);
        }
        .fixed-bottom-bar .fbb-btn {
            background-color: var(--color-accent);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 0.5rem 1.4rem;
            border-radius: 8px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
        }
        .fixed-bottom-bar .fbb-btn:hover,
        .fixed-bottom-bar .fbb-btn:focus {
            background-color: #00B386;
            color: #fff;
            outline: none;
            text-decoration: none;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-title { font-size: 32px; }
            .section-title { font-size: 22px; }
            .nav-center { gap: 0.2rem; }
            .nav-item { font-size: 12.5px; padding: 0.4rem 0.55rem; }
            .hero-section { min-height: 560px; }
        }

        @media (max-width: 768px) {
            .nav-center { display: none; }
            .hamburger { display: inline-flex; }
            .mobile-nav-panel { display: block; }
            .mobile-nav-panel.hidden-mobile { display: none; }
            .hero-section { padding: 3.5rem 0 2.5rem; min-height: auto; }
            .hero-title { font-size: 27px; line-height: 1.4; }
            .hero-subtitle { font-size: 14.5px; }
            .hero-actions { flex-direction: column; gap: 0.75rem; }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline { width: 100%; justify-content: center; }
            .hero-visual { margin-top: 2rem; }
            .section-padding { padding: 2.5rem 0; }
            .section-padding-sm { padding: 1.5rem 0; }
            .data-number { font-size: 26px; }
            .fixed-bottom-bar { height: 48px; padding: 0 0.75rem; }
            .fixed-bottom-bar .fbb-text { font-size: 12px; }
            .fixed-bottom-bar .fbb-btn { font-size: 11.5px; padding: 0.35rem 0.8rem; }
            .site-footer .footer-bottom { flex-direction: column; align-items: flex-start; }
        }

        @media (max-width: 480px) {
            .hero-title { font-size: 23px; }
            .hero-badge { font-size: 12px; padding: 0.3rem 0.8rem; }
            .btn-primary, .btn-outline { padding: 0.7rem 1.2rem; font-size: 14px; }
            .section-title { font-size: 20px; }
            .version-card { padding: 1rem; }
            .card-icon { width: 40px; height: 40px; font-size: 17px; }
            .step-item { flex-direction: column; gap: 0.75rem; }
        }

        @media (max-width: 400px) {
            .hero-title { font-size: 21px; }
            .container { padding: 0 0.9rem; }
            .nav-cta { font-size: 11.5px; padding: 0.4rem 0.8rem; }
            body { font-size: 14px; }
        }

/* roulang page: category2 */
:root {
            --color-primary: #20232A;
            --color-accent: #00C896;
            --color-accent-warm: #F59E0B;
            --color-bg: #F5F7F8;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #4B5563;
            --color-text-muted: #7B8794;
            --color-border: #E4E7EB;
            --color-accent-light: #EAFAF5;
            --radius-card: 12px;
            --radius-button: 10px;
            --shadow-card: 0 1px 3px rgba(32,35,42,0.06);
            --shadow-card-hover: 0 6px 16px rgba(32,35,42,0.12);
            --transition: all 0.2s ease-in-out;
            --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--color-accent-warm);
            text-decoration: none;
            outline: none;
        }
        a:focus-visible {
            outline: 3px solid rgba(0,200,150,0.45);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }
        button,
        .button {
            cursor: pointer;
            font-family: inherit;
            font-size: 14.5px;
            font-weight: 600;
            border-radius: var(--radius-button);
            transition: var(--transition);
            border: none;
            padding: 0.75rem 1.6rem;
            line-height: 1.6;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.02em;
        }
        button:focus-visible,
        .button:focus-visible {
            outline: 3px solid rgba(0,200,150,0.45);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .section-padding {
            padding: 4rem 0;
        }
        .section-padding-sm {
            padding: 2.5rem 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 0.75rem;
        }
        .section-label::before {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-text);
            margin: 0 0 1rem;
            letter-spacing: -0.01em;
        }
        .section-title .highlight {
            color: var(--color-accent);
        }
        .section-subtitle {
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text-secondary);
            margin: 0 0 2.5rem;
            max-width: 780px;
        }
        .text-muted {
            color: var(--color-text-muted);
        }
        .text-accent {
            color: var(--color-accent);
        }
        .text-warm {
            color: var(--color-accent-warm);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12.5px;
            font-weight: 600;
            padding: 0.3rem 0.75rem;
            border-radius: 999px;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            letter-spacing: 0.04em;
            white-space: nowrap;
        }
        .badge-warm {
            background-color: #FEF3C7;
            color: #B45309;
        }
        .badge-dark {
            background-color: var(--color-primary);
            color: #fff;
        }
        /* Header / Navigation */
        .site-header {
            background-color: var(--color-primary);
            height: 64px;
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--color-accent);
            box-shadow: 0 2px 8px rgba(0,0,0,0.12);
        }
        .site-header .toolbar-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 1.25rem;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            text-decoration: none;
            transition: var(--transition);
        }
        .nav-logo:hover,
        .nav-logo:focus {
            color: var(--color-accent);
            text-decoration: none;
        }
        .nav-logo .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            flex-shrink: 0;
        }
        .nav-center {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            flex: 1;
            justify-content: center;
        }
        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 13.5px;
            font-weight: 500;
            color: #D1D5DB;
            padding: 0.5rem 0.7rem;
            border-radius: 8px;
            transition: var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }
        .nav-item i {
            font-size: 13px;
            color: #9CA3AF;
            transition: var(--transition);
        }
        .nav-item:hover,
        .nav-item:focus {
            color: var(--color-accent);
            background-color: rgba(0,200,150,0.08);
            text-decoration: none;
        }
        .nav-item:hover i,
        .nav-item:focus i {
            color: var(--color-accent);
        }
        .nav-item.active {
            color: #fff;
            background-color: rgba(0,200,150,0.18);
            font-weight: 600;
        }
        .nav-item.active i {
            color: var(--color-accent);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-shrink: 0;
        }
        .nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12.5px;
            color: #D1D5DB;
            white-space: nowrap;
        }
        .nav-status .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        .nav-bell {
            position: relative;
            color: #D1D5DB;
            font-size: 18px;
            cursor: default;
            display: flex;
            align-items: center;
        }
        .nav-bell .bell-dot {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent-warm);
            border: 2px solid var(--color-primary);
        }
        .nav-cta {
            background-color: var(--color-accent);
            color: #fff;
            font-size: 13.5px;
            font-weight: 600;
            padding: 0.55rem 1.2rem;
            border-radius: var(--radius-button);
            transition: var(--transition);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
        }
        .nav-cta:hover,
        .nav-cta:focus {
            background-color: var(--color-accent-warm);
            color: #fff;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 22px;
            cursor: pointer;
            padding: 0.5rem;
            border-radius: 6px;
        }
        .nav-toggle:hover {
            background-color: rgba(255,255,255,0.1);
        }
        /* Mobile nav panel */
        .mobile-nav-panel {
            display: none;
            background-color: var(--color-primary);
            padding: 1rem 1.25rem;
            border-bottom: 1px solid var(--color-accent);
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            z-index: 99;
            flex-direction: column;
            gap: 0.5rem;
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel .nav-item {
            padding: 0.7rem 1rem;
            font-size: 14px;
            border-radius: 8px;
            color: #D1D5DB;
        }
        .mobile-nav-panel .nav-item.active {
            background-color: rgba(0,200,150,0.18);
            color: #fff;
        }
        /* buttons */
        .btn-primary {
            background-color: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-button);
            padding: 0.75rem 1.8rem;
            font-size: 14.5px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background-color: var(--color-accent);
            color: #fff;
            text-decoration: none;
        }
        .btn-secondary {
            background-color: transparent;
            color: var(--color-accent);
            border: 1px solid var(--color-accent);
            border-radius: var(--radius-button);
            padding: 0.7rem 1.6rem;
            font-size: 14.5px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-secondary:hover,
        .btn-secondary:focus {
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            border-color: var(--color-accent);
            text-decoration: none;
        }
        .btn-download {
            background-color: var(--color-accent);
            color: #fff;
            border-radius: var(--radius-button);
            padding: 0.6rem 1.2rem;
            font-size: 13.5px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-download:hover,
        .btn-download:focus {
            background-color: var(--color-accent-warm);
            color: #fff;
            text-decoration: none;
        }
        /* cards */
        .card {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .card-body {
            padding: 1.25rem;
        }
        .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 0.5rem;
            line-height: 1.4;
        }
        .card-text {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        /* Category banner */
        .category-banner {
            background-color: var(--color-primary);
            padding: 3rem 0 2.5rem;
            color: #fff;
            border-bottom: 1px solid var(--color-accent);
        }
        .category-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: #9CA3AF;
            margin-bottom: 1.2rem;
            flex-wrap: wrap;
        }
        .category-banner .breadcrumb a {
            color: #D1D5DB;
            transition: var(--transition);
        }
        .category-banner .breadcrumb a:hover {
            color: var(--color-accent);
        }
        .category-banner .breadcrumb .separator {
            color: #6B7280;
        }
        .category-banner h1 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 0.75rem;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }
        .category-banner .banner-sub {
            font-size: 15px;
            color: #D1D5DB;
            line-height: 1.8;
            margin: 0;
            max-width: 720px;
        }
        /* Step cards */
        .step-card {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--color-accent);
        }
        .step-number {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background-color: var(--color-accent);
            color: #fff;
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 17px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
            flex-shrink: 0;
        }
        .step-card .step-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 0.5rem;
            line-height: 1.4;
        }
        .step-card .step-desc {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin: 0;
            flex-grow: 1;
        }
        /* env cards */
        .env-card {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            height: 100%;
            transition: var(--transition);
        }
        .env-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .env-card .env-icon {
            font-size: 32px;
            color: var(--color-accent);
            margin-bottom: 1rem;
        }
        .env-card .env-name {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 0.6rem;
        }
        .env-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .env-card ul li {
            font-size: 14px;
            color: var(--color-text-secondary);
            padding: 0.35rem 0;
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.6;
        }
        .env-card ul li i {
            color: var(--color-accent);
            font-size: 13px;
            margin-top: 4px;
            flex-shrink: 0;
        }
        /* param table */
        .param-table {
            width: 100%;
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            margin: 0;
        }
        .param-table .param-row {
            display: flex;
            align-items: center;
            padding: 0.85rem 1.25rem;
            border-bottom: 1px solid var(--color-border);
            gap: 1rem;
            flex-wrap: wrap;
        }
        .param-table .param-row:last-child {
            border-bottom: none;
        }
        .param-table .param-key {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            min-width: 140px;
            font-family: var(--font-mono);
        }
        .param-table .param-value {
            font-size: 14px;
            color: var(--color-text-secondary);
            flex: 1;
            line-height: 1.6;
        }
        .param-table .param-badge {
            font-size: 12px;
            font-weight: 600;
            padding: 0.25rem 0.7rem;
            border-radius: 999px;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            white-space: nowrap;
        }
        /* notice list */
        .notice-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .notice-list li {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            padding: 1rem 1.25rem;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            transition: var(--transition);
        }
        .notice-list li:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-accent);
        }
        .notice-list li .notice-icon {
            color: var(--color-accent-warm);
            font-size: 16px;
            flex-shrink: 0;
            margin-top: 4px;
        }
        /* FAQ */
        .faq-item {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            margin-bottom: 1rem;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 1rem 1.25rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            text-align: left;
            font-family: inherit;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question .faq-icon {
            font-size: 14px;
            color: var(--color-text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-answer {
            padding: 0 1.25rem 1.1rem;
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            background-color: #FAFBFC;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            color: var(--color-accent);
        }
        /* resource cards */
        .resource-card {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            padding: 1.25rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            transition: var(--transition);
            text-decoration: none;
            color: var(--color-text);
        }
        .resource-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            text-decoration: none;
            color: var(--color-text);
            border-color: var(--color-accent);
        }
        .resource-card .resource-icon {
            font-size: 24px;
            color: var(--color-accent);
            flex-shrink: 0;
        }
        .resource-card .resource-info {
            flex: 1;
        }
        .resource-card .resource-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 0.3rem;
        }
        .resource-card .resource-desc {
            font-size: 13px;
            color: var(--color-text-muted);
            margin: 0;
        }
        /* footer */
        .site-footer {
            background-color: var(--color-primary);
            color: #D1D5DB;
            padding: 3rem 0 1.5rem;
            margin-top: 0;
        }
        .site-footer .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 1rem;
        }
        .site-footer .footer-desc {
            font-size: 13.5px;
            color: #9CA3AF;
            line-height: 1.75;
            margin: 0;
            max-width: 320px;
        }
        .site-footer .footer-heading {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 1rem;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 0.6rem;
        }
        .site-footer ul li a {
            color: #9CA3AF;
            font-size: 13.5px;
            transition: var(--transition);
            text-decoration: none;
        }
        .site-footer ul li a:hover {
            color: var(--color-accent);
            text-decoration: none;
        }
        .footer-bottom {
            border-top: 1px solid #374151;
            margin-top: 2rem;
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: #9CA3AF;
        }
        .footer-bottom span {
            white-space: nowrap;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .section-title {
                font-size: 23px;
            }
            .category-banner h1 {
                font-size: 28px;
            }
            .nav-item {
                font-size: 12.5px;
                padding: 0.5rem 0.55rem;
            }
            .nav-status {
                display: none;
            }
        }
        @media (max-width: 768px) {
            .nav-center {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-status {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .category-banner {
                padding: 2rem 0 1.75rem;
            }
            .category-banner h1 {
                font-size: 24px;
            }
            .category-banner .banner-sub {
                font-size: 14px;
            }
            .section-padding {
                padding: 3rem 0;
            }
            .section-padding-sm {
                padding: 2rem 0;
            }
            .section-title {
                font-size: 21px;
            }
            .section-subtitle {
                font-size: 14px;
                margin-bottom: 1.75rem;
            }
            .step-card {
                padding: 1.25rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }
        }
        @media (max-width: 520px) {
            body {
                font-size: 14px;
            }
            .category-banner h1 {
                font-size: 22px;
            }
            .section-title {
                font-size: 19px;
            }
            .param-table .param-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.35rem;
                padding: 0.75rem 1rem;
            }
            .param-table .param-key {
                min-width: auto;
                font-size: 13px;
            }
            .param-table .param-value {
                font-size: 13px;
            }
            .step-number {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }
        }

/* roulang page: category1 */
:root {
        --color-primary: #20232A;
        --color-accent: #00C896;
        --color-accent-warm: #F59E0B;
        --color-bg: #F5F7F8;
        --color-card: #FFFFFF;
        --color-text: #1F2933;
        --color-text-secondary: #4B5563;
        --color-text-muted: #7B8794;
        --color-border: #E4E7EB;
        --color-accent-light: #EAFAF5;
        --radius-card: 12px;
        --radius-button: 10px;
        --shadow-card: 0 1px 3px rgba(32,35,42,0.06);
        --shadow-card-hover: 0 6px 16px rgba(32,35,42,0.12);
        --transition: all 0.2s ease-in-out;
        --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    }

    *,
    *::before,
    *::after {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        font-size: 15px;
        line-height: 1.85;
        color: var(--color-text);
        background-color: var(--color-bg);
        margin: 0;
        padding: 0;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    a {
        color: var(--color-accent);
        text-decoration: none;
        transition: var(--transition);
    }

    a:hover,
    a:focus {
        color: var(--color-accent-warm);
        text-decoration: none;
        outline: none;
    }

    a:focus-visible {
        outline: 3px solid rgba(0,200,150,0.45);
        outline-offset: 2px;
        border-radius: 4px;
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-card);
    }

    button,
    .button {
        cursor: pointer;
        font-family: inherit;
        font-size: 14.5px;
        font-weight: 600;
        border-radius: var(--radius-button);
        transition: var(--transition);
        border: none;
        padding: 0.75rem 1.6rem;
        line-height: 1.6;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        letter-spacing: 0.02em;
        text-decoration: none;
        justify-content: center;
    }

    button:focus-visible,
    .button:focus-visible {
        outline: 3px solid rgba(0,200,150,0.45);
        outline-offset: 2px;
    }

    .button.primary {
        background-color: var(--color-primary);
        color: #fff;
        border: 1px solid var(--color-primary);
    }

    .button.primary:hover,
    .button.primary:focus {
        background-color: var(--color-accent);
        border-color: var(--color-accent);
        color: #fff;
    }

    .button.secondary {
        background-color: transparent;
        color: var(--color-accent);
        border: 1px solid var(--color-accent);
    }

    .button.secondary:hover,
    .button.secondary:focus {
        background-color: var(--color-accent-light);
        border-color: var(--color-accent-dark, #00a87e);
        color: var(--color-accent);
    }

    .button.expanded {
        width: 100%;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 1.25rem;
    }

    .section-padding {
        padding: 4rem 0;
    }

    .section-padding-sm {
        padding: 2.5rem 0;
    }

    .bg-alt {
        background-color: #FFFFFF;
    }

    .section-label {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        font-weight: 600;
        color: var(--color-accent);
        text-transform: uppercase;
        letter-spacing: 0.06em;
        margin-bottom: 0.75rem;
    }

    .section-label::before {
        content: "";
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background-color: var(--color-accent);
        display: inline-block;
    }

    .section-title {
        font-size: 26px;
        font-weight: 700;
        line-height: 1.35;
        color: var(--color-text);
        margin: 0 0 1rem;
        letter-spacing: -0.01em;
    }

    .section-title .highlight {
        color: var(--color-accent);
    }

    .section-subtitle {
        font-size: 15px;
        line-height: 1.85;
        color: var(--color-text-secondary);
        margin: 0 0 2.5rem;
        max-width: 780px;
    }

    .text-muted {
        color: var(--color-text-muted);
    }

    .text-accent {
        color: var(--color-accent);
    }

    .text-warm {
        color: var(--color-accent-warm);
    }

    .badge {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        font-size: 12.5px;
        font-weight: 600;
        padding: 0.3rem 0.75rem;
        border-radius: 999px;
        background-color: var(--color-accent-light);
        color: var(--color-accent);
        letter-spacing: 0.04em;
        white-space: nowrap;
    }

    .badge-warm {
        background-color: #FEF3C7;
        color: #B45309;
    }

    .badge-dark {
        background-color: var(--color-primary);
        color: #fff;
    }

    /* Header / Navigation */
    .site-header {
        background-color: var(--color-primary);
        height: 64px;
        position: sticky;
        top: 0;
        z-index: 100;
        border-bottom: 1px solid var(--color-accent);
        box-shadow: 0 2px 8px rgba(0,0,0,0.12);
    }

    .site-header .toolbar-nav {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        gap: 1.25rem;
    }

    .nav-logo {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 18px;
        font-weight: 700;
        color: #fff;
        letter-spacing: 0.02em;
        white-space: nowrap;
        text-decoration: none;
        transition: var(--transition);
    }

    .nav-logo:hover,
    .nav-logo:focus {
        color: var(--color-accent);
        text-decoration: none;
    }

    .nav-logo .logo-dot {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background-color: var(--color-accent);
        display: inline-block;
        flex-shrink: 0;
    }

    .nav-center {
        display: flex;
        align-items: center;
        gap: 0.4rem;
        flex: 1;
        justify-content: center;
    }

    .nav-item {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        font-size: 13.5px;
        font-weight: 500;
        color: #D1D5DB;
        padding: 0.5rem 0.7rem;
        border-radius: 8px;
        transition: var(--transition);
        white-space: nowrap;
        text-decoration: none;
    }

    .nav-item i {
        font-size: 13px;
    }

    .nav-item:hover,
    .nav-item:focus {
        color: var(--color-accent);
        background-color: rgba(0,200,150,0.12);
        text-decoration: none;
    }

    .nav-item.active {
        color: var(--color-accent);
        background-color: rgba(0,200,150,0.12);
    }

    .nav-actions {
        display: flex;
        align-items: center;
        gap: 1rem;
    }

    .status-indicator {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        font-weight: 500;
        color: #D1D5DB;
        white-space: nowrap;
    }

    .status-dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background-color: #33CC66;
        display: inline-block;
    }

    .notification-bell {
        position: relative;
        color: #D1D5DB;
        font-size: 18px;
        cursor: default;
    }

    .notification-dot {
        position: absolute;
        top: -4px;
        right: -4px;
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background-color: var(--color-accent-warm);
    }

    .nav-cta {
        background-color: var(--color-accent);
        color: #fff;
        border: 1px solid var(--color-accent);
        padding: 0.5rem 1.1rem;
        font-size: 13.5px;
        white-space: nowrap;
        text-decoration: none;
    }

    .nav-cta:hover,
    .nav-cta:focus {
        background-color: var(--color-primary);
        border-color: var(--color-accent);
        color: #fff;
        text-decoration: none;
    }

    .mobile-toggle {
        display: none;
        background: transparent;
        border: none;
        color: #D1D5DB;
        font-size: 22px;
        padding: 0.5rem;
    }

    /* Category Banner */
    .category-banner {
        background-color: var(--color-bg);
        padding: 2.5rem 0;
        border-bottom: 1px solid var(--color-border);
    }

    .banner-content {
        padding-right: 1.5rem;
    }

    .banner-content h1 {
        font-size: 32px;
        font-weight: 700;
        line-height: 1.3;
        margin: 0.75rem 0 0.5rem;
        color: var(--color-text);
    }

    .banner-content p {
        font-size: 15px;
        line-height: 1.85;
        color: var(--color-text-secondary);
        margin: 0 0 1rem;
        max-width: 600px;
    }

    .banner-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
        font-size: 13.5px;
        color: var(--color-text-secondary);
    }

    .banner-meta span {
        display: inline-flex;
        align-items: center;
        gap: 5px;
    }

    .banner-meta i {
        color: var(--color-accent);
    }

    .banner-image img {
        width: 100%;
        height: auto;
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
    }

    /* Intro Block */
    .intro-block {
        background-color: var(--color-card);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-card);
        padding: 2rem 2.5rem;
        box-shadow: var(--shadow-card);
    }

    .intro-block h2 {
        font-size: 22px;
        font-weight: 700;
        margin: 0 0 1rem;
        color: var(--color-text);
    }

    .intro-block p {
        font-size: 15px;
        line-height: 1.9;
        color: var(--color-text-secondary);
        margin: 0;
    }

    /* Section Header */
    .section-header {
        display: flex;
        justify-content: space-between;
        align-items: flex-end;
        margin-bottom: 2rem;
        gap: 1rem;
        flex-wrap: wrap;
    }

    .section-header h2 {
        font-size: 24px;
        font-weight: 700;
        margin: 0;
        color: var(--color-text);
    }

    .text-link {
        font-size: 14px;
        font-weight: 600;
        color: var(--color-accent);
        display: inline-flex;
        align-items: center;
        gap: 5px;
        text-decoration: none;
    }

    .text-link:hover {
        color: var(--color-accent-warm);
        text-decoration: none;
    }

    /* Version Grid */
    .version-grid {
        display: flex;
        flex-wrap: wrap;
        gap: 1.25rem;
    }

    .version-grid .cell {
        flex: 0 0 calc(33.333% - 0.833rem);
        max-width: calc(33.333% - 0.833rem);
    }

    .version-card {
        background-color: var(--color-card);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 1.75rem 1.5rem;
        display: flex;
        flex-direction: column;
        height: 100%;
        transition: var(--transition);
    }

    .version-card:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-2px);
        border-color: #D1D5DB;
    }

    .version-card-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 0.5rem;
        margin-bottom: 0.75rem;
    }

    .version-code {
        font-family: var(--font-mono);
        font-size: 18px;
        font-weight: 700;
        color: var(--color-text);
    }

    .version-card h3 {
        font-size: 17px;
        font-weight: 700;
        margin: 0 0 0.5rem;
        color: var(--color-text);
    }

    .version-meta {
        font-size: 13px;
        color: var(--color-text-muted);
        margin: 0 0 0.75rem;
        font-family: var(--font-mono);
    }

    .version-desc {
        font-size: 14px;
        line-height: 1.8;
        color: var(--color-text-secondary);
        margin: 0 0 1rem;
        flex-grow: 1;
    }

    .version-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        margin-bottom: 1.25rem;
    }

    .version-tags span {
        font-size: 12px;
        font-weight: 500;
        padding: 0.25rem 0.7rem;
        border-radius: 999px;
        background-color: var(--color-accent-light);
        color: var(--color-accent);
        letter-spacing: 0.02em;
    }

    /* Stats Grid */
    .stats-grid {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
        justify-content: center;
    }

    .stat-item {
        background-color: var(--color-card);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 1.5rem 2rem;
        text-align: center;
        flex: 0 0 auto;
        min-width: 160px;
    }

    .stat-item strong {
        font-size: 26px;
        font-weight: 700;
        color: var(--color-accent);
        display: block;
        line-height: 1.3;
        font-family: var(--font-mono);
    }

    .stat-item span {
        font-size: 13px;
        color: var(--color-text-secondary);
    }

    /* Quick Start */
    .quick-start {
        background-color: var(--color-primary);
        border-radius: var(--radius-card);
        padding: 2.5rem 2rem;
        color: #fff;
    }

    .quick-start h2 {
        font-size: 24px;
        font-weight: 700;
        margin: 0 0 1.5rem;
        color: #fff;
    }

    .quick-start .step-item {
        background-color: rgba(255,255,255,0.08);
        border-radius: 8px;
        padding: 1.25rem 1rem;
        font-size: 14px;
        font-weight: 500;
        color: #E5E7EB;
        text-align: center;
    }

    .quick-start .step-item .step-num {
        display: block;
        font-size: 18px;
        font-weight: 700;
        color: var(--color-accent);
        margin-bottom: 0.5rem;
    }

    /* Compare */
    .compare-grid {
        display: flex;
        flex-wrap: wrap;
        gap: 1.25rem;
    }

    .compare-card {
        background-color: var(--color-card);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 1.75rem 1.5rem;
        flex: 0 0 calc(33.333% - 0.833rem);
        max-width: calc(33.333% - 0.833rem);
        transition: var(--transition);
    }

    .compare-card:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-2px);
    }

    .compare-card h3 {
        font-size: 18px;
        font-weight: 700;
        margin: 0 0 1rem;
        color: var(--color-text);
        font-family: var(--font-mono);
    }

    .compare-card ul {
        margin: 0;
        padding: 0;
        list-style: none;
    }

    .compare-card li {
        font-size: 14px;
        color: var(--color-text-secondary);
        padding: 0.4rem 0;
        border-bottom: 1px solid var(--color-border);
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .compare-card li::before {
        content: "✓";
        color: var(--color-accent);
        font-weight: 700;
        flex-shrink: 0;
    }

    /* Notice List */
    .notice-list {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .notice-list li {
        background-color: var(--color-card);
        border: 1px solid var(--color-border);
        border-radius: 8px;
        padding: 1rem 1.5rem;
        font-size: 14.5px;
        line-height: 1.8;
        color: var(--color-text-secondary);
        display: flex;
        align-items: flex-start;
        gap: 12px;
    }

    .notice-list li::before {
        content: "!";
        color: var(--color-accent-warm);
        font-weight: 700;
        font-size: 16px;
        flex-shrink: 0;
        background-color: #FEF3C7;
        width: 24px;
        height: 24px;
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    /* Related Cards */
    .related-card {
        background-color: var(--color-card);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 1.5rem;
        text-align: center;
        transition: var(--transition);
        height: 100%;
    }

    .related-card:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-2px);
        border-color: #D1D5DB;
    }

    .related-card i {
        font-size: 28px;
        color: var(--color-accent);
        margin-bottom: 0.75rem;
    }

    .related-card h3 {
        font-size: 17px;
        font-weight: 700;
        margin: 0 0 0.5rem;
        color: var(--color-text);
    }

    .related-card p {
        font-size: 13.5px;
        line-height: 1.8;
        color: var(--color-text-secondary);
        margin: 0;
    }

    /* Footer */
    .site-footer {
        background-color: var(--color-primary);
        color: #fff;
        padding: 3rem 0 1.5rem;
        margin-top: 0;
    }

    .site-footer .footer-brand {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 18px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 1rem;
    }

    .site-footer .logo-dot {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background-color: var(--color-accent);
        display: inline-block;
    }

    .site-footer .footer-desc {
        font-size: 13.5px;
        line-height: 1.9;
        color: #B0B8C4;
        margin: 0 0 1.5rem;
    }

    .site-footer .footer-heading {
        font-size: 16px;
        font-weight: 700;
        color: #fff;
        margin: 0 0 1rem;
    }

    .site-footer ul {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .site-footer ul li {
        margin-bottom: 0.5rem;
    }

    .site-footer ul li a {
        font-size: 13.5px;
        color: #B0B8C4;
        transition: var(--transition);
    }

    .site-footer ul li a:hover {
        color: var(--color-accent);
    }

    .site-footer .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.1);
        margin-top: 2.5rem;
        padding-top: 1.5rem;
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
        justify-content: space-between;
        font-size: 12.5px;
        color: #8B95A1;
    }

    /* Responsive */
    @media screen and (max-width: 1024px) {
        .version-grid .cell,
        .compare-card {
            flex: 0 0 calc(50% - 0.625rem);
            max-width: calc(50% - 0.625rem);
        }
        .banner-content h1 {
            font-size: 28px;
        }
    }

    @media screen and (max-width: 768px) {
        .site-header {
            height: auto;
            min-height: 64px;
            padding: 0.75rem 0;
        }

        .site-header .toolbar-nav {
            flex-wrap: wrap;
            height: auto;
            gap: 0.5rem;
        }

        .nav-center {
            display: none;
            order: 10;
            width: 100%;
            flex-direction: column;
            align-items: stretch;
            background-color: var(--color-primary);
            padding: 1rem 0;
            gap: 0.5rem;
        }

        .nav-center.open {
            display: flex;
        }

        .nav-item {
            padding: 0.75rem 1rem;
            font-size: 14px;
            border-radius: 8px;
            justify-content: flex-start;
        }

        .nav-actions {
            margin-left: auto;
        }

        .mobile-toggle {
            display: inline-flex;
        }

        .compare-card,
        .version-grid .cell {
            flex: 0 0 100%;
            max-width: 100%;
        }

        .stats-grid {
            justify-content: center;
        }

        .stat-item {
            min-width: 120px;
            padding: 1rem 1.25rem;
        }

        .section-header {
            flex-direction: column;
            align-items: flex-start;
            gap: 0.5rem;
        }

        .banner-content {
            padding-right: 0;
            margin-bottom: 1.5rem;
        }

        .category-banner {
            padding: 2rem 0;
        }

        .intro-block {
            padding: 1.5rem;
        }
    }

    @media screen and (max-width: 480px) {
        .site-header .toolbar-nav {
            gap: 0.25rem;
        }

        .nav-logo {
            font-size: 16px;
        }

        .nav-cta {
            padding: 0.4rem 0.8rem;
            font-size: 12.5px;
        }

        .banner-content h1 {
            font-size: 24px;
        }

        .banner-meta {
            flex-direction: column;
            gap: 0.4rem;
        }

        .section-padding {
            padding: 2.5rem 0;
        }

        .section-padding-sm {
            padding: 1.75rem 0;
        }

        .stat-item strong {
            font-size: 20px;
        }
    }

/* roulang page: category3 */
:root {
            --color-primary: #20232A;
            --color-accent: #00C896;
            --color-accent-warm: #F59E0B;
            --color-bg: #F5F7F8;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #4B5563;
            --color-text-muted: #7B8794;
            --color-border: #E4E7EB;
            --color-accent-light: #EAFAF5;
            --radius-card: 12px;
            --radius-button: 10px;
            --shadow-card: 0 1px 3px rgba(32, 35, 42, 0.06);
            --shadow-card-hover: 0 6px 16px rgba(32, 35, 42, 0.12);
            --transition: all 0.2s ease-in-out;
            --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--color-accent-warm);
            text-decoration: none;
            outline: none;
        }
        a:focus-visible {
            outline: 3px solid rgba(0, 200, 150, 0.45);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }
        button,
        .button {
            cursor: pointer;
            font-family: inherit;
            font-size: 14.5px;
            font-weight: 600;
            border-radius: var(--radius-button);
            transition: var(--transition);
            border: none;
            padding: 0.75rem 1.6rem;
            line-height: 1.6;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.02em;
        }
        button:focus-visible,
        .button:focus-visible {
            outline: 3px solid rgba(0, 200, 150, 0.45);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .section-padding {
            padding: 4rem 0;
        }
        .section-padding-sm {
            padding: 2.5rem 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 0.75rem;
        }
        .section-label::before {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-text);
            margin: 0 0 1rem;
            letter-spacing: -0.01em;
        }
        .section-title .highlight {
            color: var(--color-accent);
        }
        .section-subtitle {
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text-secondary);
            margin: 0 0 2.5rem;
            max-width: 780px;
        }
        .text-muted {
            color: var(--color-text-muted);
        }
        .text-accent {
            color: var(--color-accent);
        }
        .text-warm {
            color: var(--color-accent-warm);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12.5px;
            font-weight: 600;
            padding: 0.3rem 0.75rem;
            border-radius: 999px;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            letter-spacing: 0.04em;
            white-space: nowrap;
        }
        .badge-warm {
            background-color: #FEF3C7;
            color: #B45309;
        }
        .badge-dark {
            background-color: var(--color-primary);
            color: #fff;
        }
        /* Header / Navigation */
        .site-header {
            background-color: var(--color-primary);
            height: 64px;
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--color-accent);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
        }
        .site-header .toolbar-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 1.25rem;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            text-decoration: none;
            transition: var(--transition);
        }
        .nav-logo:hover,
        .nav-logo:focus {
            color: var(--color-accent);
            text-decoration: none;
        }
        .nav-logo .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            flex-shrink: 0;
        }
        .nav-center {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            flex: 1;
            justify-content: center;
        }
        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 13.5px;
            font-weight: 500;
            color: #D1D5DB;
            padding: 0.5rem 0.7rem;
            border-radius: 8px;
            transition: var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }
        .nav-item i {
            font-size: 13px;
        }
        .nav-item:hover,
        .nav-item:focus {
            color: var(--color-accent);
            background-color: rgba(0, 200, 150, 0.08);
        }
        .nav-item.active {
            color: var(--color-accent);
            background-color: rgba(0, 200, 150, 0.12);
            font-weight: 600;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 0.9rem;
            flex-shrink: 0;
        }
        .nav-status {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 500;
            color: #D1D5DB;
            white-space: nowrap;
        }
        .nav-status .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
        }
        .nav-bell {
            color: #D1D5DB;
            font-size: 16px;
            cursor: default;
            position: relative;
            transition: var(--transition);
        }
        .nav-bell .bell-dot {
            position: absolute;
            top: -2px;
            right: -3px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background-color: var(--color-accent-warm);
            display: block;
        }
        .nav-cta {
            background-color: var(--color-accent);
            color: #fff;
            padding: 0.5rem 1rem;
            font-size: 13px;
            font-weight: 600;
            border-radius: 8px;
            white-space: nowrap;
            text-decoration: none;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .nav-cta:hover,
        .nav-cta:focus {
            background-color: var(--color-primary);
            color: #fff;
        }
        .nav-hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 20px;
            cursor: pointer;
            padding: 0.4rem;
            border-radius: 6px;
        }
        .nav-hamburger:hover {
            color: var(--color-accent);
        }
        .mobile-nav-panel {
            display: none;
            background-color: var(--color-primary);
            padding: 0.75rem 1.25rem 1.25rem;
            border-top: 1px solid var(--color-border);
            flex-direction: column;
            gap: 0.35rem;
        }
        .mobile-nav-panel.is-open {
            display: flex;
        }
        .mobile-nav-panel .nav-item {
            padding: 0.65rem 0.75rem;
            font-size: 14px;
        }
        /* Category Banner */
        .category-banner {
            background-color: var(--color-primary);
            padding: 3.5rem 0 3rem;
            position: relative;
            overflow: hidden;
        }
        .category-banner::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            left: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(0, 200, 150, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }
        .category-banner .container {
            position: relative;
            z-index: 1;
        }
        .category-banner h1 {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 0.75rem;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }
        .category-banner .banner-subtitle {
            font-size: 15px;
            color: #B0BEC5;
            margin: 0;
            max-width: 780px;
            line-height: 1.85;
        }
        .category-banner .banner-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-top: 1.5rem;
            flex-wrap: wrap;
        }
        /* Card base */
        .card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            padding: 1.5rem;
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        /* Device cards */
        .device-card {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1.25rem 1.5rem;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            margin-bottom: 12px;
        }
        .device-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-accent);
            transform: translateY(-2px);
        }
        .device-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background-color: var(--color-accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-accent);
            flex-shrink: 0;
        }
        .device-info {
            flex: 1;
            min-width: 0;
        }
        .device-name {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 2px;
        }
        .device-desc {
            font-size: 13.5px;
            color: var(--color-text-muted);
            margin: 0;
            line-height: 1.6;
        }
        .device-status {
            flex-shrink: 0;
        }
        .status-dot {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 12.5px;
            font-weight: 600;
            padding: 0.35rem 0.8rem;
            border-radius: 999px;
            white-space: nowrap;
        }
        .status-dot::before {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
        }
        .status-supported {
            background-color: var(--color-accent-light);
            color: var(--color-accent);
        }
        .status-supported::before {
            background-color: var(--color-accent);
        }
        .status-partial {
            background-color: #FEF3C7;
            color: #B45309;
        }
        .status-partial::before {
            background-color: var(--color-accent-warm);
        }
        /* Technical count strip */
        .tech-strip {
            background-color: var(--color-primary);
            border-radius: var(--radius-card);
            padding: 1.75rem 1.5rem;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.25rem;
        }
        .tech-item {
            text-align: center;
        }
        .tech-value {
            font-family: var(--font-mono);
            font-size: 22px;
            font-weight: 700;
            color: var(--color-accent);
            margin-bottom: 4px;
        }
        .tech-label {
            font-size: 13px;
            color: #B0BEC5;
            margin: 0;
        }
        /* Notice list */
        .notice-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .notice-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.8rem;
            padding: 0.85rem 0;
            border-bottom: 1px solid var(--color-border);
            font-size: 14.5px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }
        .notice-list li:last-child {
            border-bottom: none;
        }
        .notice-list li i {
            color: var(--color-accent-warm);
            font-size: 14px;
            margin-top: 5px;
            flex-shrink: 0;
        }
        /* Topic entry */
        .topic-entry {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: block;
            text-decoration: none;
            color: var(--color-text);
            height: 100%;
        }
        .topic-entry:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-accent);
            transform: translateY(-2px);
            color: var(--color-text);
        }
        .topic-entry .topic-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background-color: var(--color-accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--color-accent);
            margin-bottom: 0.75rem;
        }
        .topic-entry h3 {
            font-size: 16px;
            font-weight: 600;
            margin: 0 0 0.4rem;
            color: var(--color-text);
        }
        .topic-entry p {
            font-size: 13.5px;
            color: var(--color-text-muted);
            margin: 0;
            line-height: 1.6;
        }
        /* CTA panel */
        .cta-panel {
            background-color: var(--color-primary);
            border-radius: var(--radius-card);
            padding: 2.5rem 2rem;
            text-align: center;
            color: #fff;
        }
        .cta-panel h2 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 0.6rem;
        }
        .cta-panel p {
            font-size: 14.5px;
            color: #B0BEC5;
            margin: 0 0 1.5rem;
            line-height: 1.8;
        }
        .cta-panel .button-primary {
            background-color: var(--color-accent);
            color: #fff;
            border-radius: var(--radius-button);
            padding: 0.8rem 1.8rem;
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .cta-panel .button-primary:hover,
        .cta-panel .button-primary:focus {
            background-color: #fff;
            color: var(--color-primary);
        }
        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            color: #D1D5DB;
            padding: 3rem 0 0;
            margin-top: 0;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .site-footer .footer-brand .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
        }
        .footer-desc {
            font-size: 13.5px;
            color: #7B8794;
            line-height: 1.8;
            margin: 0 0 1rem;
        }
        .footer-heading {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 0.9rem;
            letter-spacing: 0.03em;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 0.55rem;
        }
        .site-footer ul li a {
            color: #7B8794;
            font-size: 13.5px;
            text-decoration: none;
            transition: var(--transition);
        }
        .site-footer ul li a:hover,
        .site-footer ul li a:focus {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.25rem 0;
            margin-top: 2rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem 1.5rem;
            font-size: 12.5px;
            color: #6B7280;
        }
        .footer-bottom span {
            white-space: nowrap;
        }
        .footer-bottom a {
            color: #6B7280;
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: var(--color-accent);
        }
        /* Buttons */
        .button-primary {
            background-color: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-button);
            padding: 0.8rem 1.8rem;
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .button-primary:hover,
        .button-primary:focus {
            background-color: var(--color-accent);
            color: #fff;
        }
        .button-secondary {
            background-color: transparent;
            color: var(--color-accent);
            border: 1px solid var(--color-accent);
            border-radius: var(--radius-button);
            padding: 0.8rem 1.8rem;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .button-secondary:hover,
        .button-secondary:focus {
            background-color: var(--color-accent-light);
            color: var(--color-accent);
        }
        .button-secondary:active {
            border-color: var(--color-primary);
        }
        /* Utility */
        .mt-0 { margin-top: 0; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .text-center { text-align: center; }
        /* Responsive */
        @media (max-width: 1024px) {
            .nav-center {
                gap: 0.15rem;
            }
            .nav-item {
                font-size: 12.5px;
                padding: 0.45rem 0.55rem;
            }
            .tech-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .category-banner h1 {
                font-size: 28px;
            }
        }
        @media (max-width: 768px) {
            .nav-center {
                display: none;
            }
            .nav-right .nav-status,
            .nav-right .nav-bell {
                display: none;
            }
            .nav-right .nav-cta {
                padding: 0.45rem 0.8rem;
                font-size: 12px;
            }
            .nav-hamburger {
                display: block;
            }
            .site-header {
                height: 60px;
            }
            .section-padding {
                padding: 2.5rem 0;
            }
            .category-banner {
                padding: 2.5rem 0 2rem;
            }
            .category-banner h1 {
                font-size: 24px;
            }
            .tech-strip {
                padding: 1.25rem 1rem;
                gap: 1rem;
            }
            .tech-value {
                font-size: 18px;
            }
            .device-card {
                padding: 1rem 1.1rem;
                gap: 0.75rem;
            }
            .device-icon {
                width: 36px;
                height: 36px;
                font-size: 17px;
            }
            .device-name {
                font-size: 14.5px;
            }
            .device-desc {
                font-size: 12.5px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 0.4rem;
            }
            .cta-panel {
                padding: 1.75rem 1.25rem;
            }
        }
        @media (max-width: 480px) {
            .nav-logo {
                font-size: 16px;
            }
            .nav-cta {
                font-size: 11px;
                padding: 0.4rem 0.6rem;
            }
            .section-title {
                font-size: 22px;
            }
            .tech-strip {
                grid-template-columns: 1fr 1fr;
            }
            .tech-value {
                font-size: 16px;
            }
            .device-status .status-dot {
                font-size: 11px;
                padding: 0.3rem 0.6rem;
            }
        }
        /* Layout helper overrides for Foundation grid with gap */
        .grid-x {
            margin-left: -0.75rem;
            margin-right: -0.75rem;
        }
        .grid-x > .cell {
            padding-left: 0.75rem;
            padding-right: 0.75rem;
        }

/* roulang page: category4 */
:root {
            --color-primary: #20232A;
            --color-accent: #00C896;
            --color-accent-warm: #F59E0B;
            --color-bg: #F5F7F8;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #4B5563;
            --color-text-muted: #7B8794;
            --color-border: #E4E7EB;
            --color-accent-light: #EAFAF5;
            --radius-card: 12px;
            --radius-button: 10px;
            --shadow-card: 0 1px 3px rgba(32,35,42,0.06);
            --shadow-card-hover: 0 6px 16px rgba(32,35,42,0.12);
            --transition: all 0.2s ease-in-out;
            --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover,
        a:focus {
            color: var(--color-accent-warm);
            text-decoration: none;
            outline: none;
        }

        a:focus-visible {
            outline: 3px solid rgba(0,200,150,0.45);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }

        button,
        .button {
            cursor: pointer;
            font-family: inherit;
            font-size: 14.5px;
            font-weight: 600;
            border-radius: var(--radius-button);
            transition: var(--transition);
            border: none;
            padding: 0.75rem 1.6rem;
            line-height: 1.6;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.02em;
            text-decoration: none;
        }

        button:focus-visible,
        .button:focus-visible {
            outline: 3px solid rgba(0,200,150,0.45);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        .section-padding {
            padding: 3.5rem 0;
        }

        .section-padding-sm {
            padding: 2.25rem 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 0.75rem;
        }

        .section-label::before {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
        }

        .section-title {
            font-size: 25px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-text);
            margin: 0 0 1rem;
            letter-spacing: -0.01em;
        }

        .section-title .highlight {
            color: var(--color-accent);
        }

        .section-subtitle {
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text-secondary);
            margin: 0 0 2rem;
            max-width: 780px;
        }

        .text-muted {
            color: var(--color-text-muted);
        }

        .text-accent {
            color: var(--color-accent);
        }

        .text-warm {
            color: var(--color-accent-warm);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12.5px;
            font-weight: 600;
            padding: 0.3rem 0.75rem;
            border-radius: 999px;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .badge-warm {
            background-color: #FEF3C7;
            color: #B45309;
        }

        .badge-dark {
            background-color: var(--color-primary);
            color: #fff;
        }

        .site-header {
            background-color: var(--color-primary);
            height: 64px;
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--color-accent);
            box-shadow: 0 2px 8px rgba(0,0,0,0.12);
        }

        .site-header .toolbar-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 1.25rem;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            text-decoration: none;
            transition: var(--transition);
        }

        .nav-logo:hover,
        .nav-logo:focus {
            color: var(--color-accent);
            text-decoration: none;
        }

        .nav-logo .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            flex-shrink: 0;
        }

        .nav-center {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            flex: 1;
            justify-content: center;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 13.5px;
            font-weight: 500;
            color: #D1D5DB;
            padding: 0.5rem 0.7rem;
            border-radius: 8px;
            transition: var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }

        .nav-item i {
            font-size: 13px;
        }

        .nav-item:hover,
        .nav-item:focus {
            color: var(--color-accent);
            background-color: rgba(0,200,150,0.08);
            text-decoration: none;
        }

        .nav-item.active {
            color: var(--color-accent);
            background-color: rgba(0,200,150,0.12);
            font-weight: 600;
        }

        .nav-status {
            display: flex;
            align-items: center;
            gap: 0.9rem;
            flex-shrink: 0;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }

        .status-text {
            font-size: 12.5px;
            color: #D1D5DB;
            white-space: nowrap;
        }

        .status-text strong {
            color: #fff;
            font-weight: 600;
            font-family: var(--font-mono);
        }

        .nav-bell {
            color: #D1D5DB;
            font-size: 16px;
            position: relative;
            cursor: default;
            transition: var(--transition);
        }

        .nav-bell:hover {
            color: var(--color-accent);
        }

        .nav-bell .bell-dot {
            position: absolute;
            top: -2px;
            right: -3px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background-color: var(--color-accent-warm);
        }

        .btn-primary {
            background-color: var(--color-primary);
            color: #fff;
            border: 1px solid var(--color-primary);
            padding: 0.7rem 1.4rem;
            font-size: 13.5px;
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background-color: var(--color-accent);
            border-color: var(--color-accent);
            color: #fff;
            text-decoration: none;
        }

        .btn-accent {
            background-color: var(--color-accent);
            color: #fff;
            border: 1px solid var(--color-accent);
            padding: 0.7rem 1.4rem;
            font-size: 13.5px;
        }

        .btn-accent:hover,
        .btn-accent:focus {
            background-color: #00b386;
            border-color: #00b386;
            color: #fff;
            text-decoration: none;
        }

        .btn-outline {
            background-color: transparent;
            color: var(--color-accent);
            border: 1px solid var(--color-accent);
            padding: 0.7rem 1.4rem;
            font-size: 13.5px;
        }

        .btn-outline:hover,
        .btn-outline:focus {
            background-color: var(--color-accent-light);
            border-color: var(--color-accent);
            color: var(--color-accent);
            text-decoration: none;
        }

        .btn-warm {
            background-color: var(--color-accent-warm);
            color: #fff;
            border: 1px solid var(--color-accent-warm);
            padding: 0.7rem 1.4rem;
            font-size: 13.5px;
        }

        .btn-warm:hover,
        .btn-warm:focus {
            background-color: #d88a06;
            border-color: #d88a06;
            color: #fff;
            text-decoration: none;
        }

        .btn-sm {
            padding: 0.5rem 1rem;
            font-size: 12.5px;
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 22px;
            padding: 0.5rem;
            cursor: pointer;
            border-radius: 8px;
            transition: var(--transition);
        }

        .hamburger:hover,
        .hamburger:focus {
            background-color: rgba(255,255,255,0.08);
            color: var(--color-accent);
            outline: none;
        }

        .mobile-nav-panel {
            display: none;
            background-color: var(--color-primary);
            border-top: 1px solid rgba(0,200,150,0.3);
            padding: 0.75rem 1rem 1rem;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            z-index: 99;
            box-shadow: 0 8px 16px rgba(0,0,0,0.15);
        }

        .mobile-nav-panel.open {
            display: block;
        }

        .mobile-nav-panel .nav-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0.7rem 0.5rem;
            color: #D1D5DB;
            font-size: 14px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            border-radius: 0;
        }

        .mobile-nav-panel .nav-item:last-child {
            border-bottom: none;
        }

        .mobile-nav-panel .nav-item:hover,
        .mobile-nav-panel .nav-item.active {
            color: var(--color-accent);
            background-color: transparent;
        }

        .category-banner {
            background-color: var(--color-primary);
            background-image: linear-gradient(135deg, rgba(32,35,42,0.92) 0%, rgba(32,35,42,0.78) 100%), url('/assets/images/b28acbcef76928ee.webp');
            background-size: cover;
            background-position: center;
            padding: 3rem 0 2.5rem;
            position: relative;
            border-bottom: 3px solid var(--color-accent);
        }

        .category-banner .banner-content {
            position: relative;
            z-index: 2;
        }

        .category-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: rgba(255,255,255,0.6);
            margin-bottom: 1rem;
            flex-wrap: wrap;
        }

        .category-banner .breadcrumb a {
            color: rgba(255,255,255,0.7);
            transition: var(--transition);
        }

        .category-banner .breadcrumb a:hover {
            color: var(--color-accent);
        }

        .category-banner .breadcrumb .separator {
            color: rgba(255,255,255,0.4);
        }

        .category-banner .banner-title {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            line-height: 1.3;
            margin: 0 0 0.75rem;
        }

        .category-banner .banner-title .highlight {
            color: var(--color-accent);
        }

        .category-banner .banner-subtitle {
            font-size: 15.5px;
            color: rgba(255,255,255,0.75);
            max-width: 720px;
            line-height: 1.8;
            margin: 0;
        }

        .metric-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            transition: var(--transition);
            height: 100%;
        }

        .metric-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(0,200,150,0.3);
        }

        .metric-card .metric-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 0.9rem;
        }

        .metric-card .metric-value {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.2;
            font-family: var(--font-mono);
            letter-spacing: -0.01em;
        }

        .metric-card .metric-value .unit {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-muted);
            margin-left: 3px;
        }

        .metric-card .metric-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-secondary);
            margin-top: 0.35rem;
        }

        .metric-card .metric-trend {
            font-size: 12.5px;
            color: var(--color-accent);
            font-weight: 500;
            margin-top: 0.5rem;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .metric-card .metric-trend.down {
            color: var(--color-accent-warm);
        }

        .compare-chart {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.75rem;
        }

        .chart-row {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1.25rem;
        }

        .chart-row:last-child {
            margin-bottom: 0;
        }

        .chart-label {
            flex-shrink: 0;
            width: 90px;
            font-size: 13.5px;
            font-weight: 600;
            color: var(--color-text-secondary);
            text-align: right;
            white-space: nowrap;
        }

        .chart-bar-wrap {
            flex: 1;
            background-color: #F1F3F5;
            border-radius: 6px;
            height: 30px;
            position: relative;
            overflow: hidden;
        }

        .chart-bar {
            height: 100%;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: flex-end;
            padding-right: 10px;
            font-size: 12px;
            font-weight: 600;
            color: #fff;
            transition: width 0.8s ease-out;
            min-width: 40px;
            white-space: nowrap;
        }

        .chart-bar.bar-accent {
            background-color: var(--color-accent);
        }

        .chart-bar.bar-warm {
            background-color: var(--color-accent-warm);
        }

        .chart-bar.bar-dark {
            background-color: var(--color-primary);
        }

        .chart-bar.bar-gray {
            background-color: #9CA3AF;
        }

        .chart-bar .bar-value {
            font-size: 11.5px;
            font-family: var(--font-mono);
            font-weight: 600;
        }

        .config-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            transition: var(--transition);
            height: 100%;
        }

        .config-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(0,200,150,0.3);
        }

        .config-card .config-level {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 13px;
            font-weight: 700;
            padding: 0.3rem 0.85rem;
            border-radius: 999px;
            margin-bottom: 1rem;
            letter-spacing: 0.03em;
        }

        .config-card .config-level.level-min {
            background-color: #FEF3C7;
            color: #B45309;
        }

        .config-card .config-level.level-rec {
            background-color: var(--color-accent-light);
            color: #008f6a;
        }

        .config-card .config-level.level-high {
            background-color: #E0E7FF;
            color: #4338CA;
        }

        .config-card .config-specs {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .config-card .config-specs li {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0.5rem 0;
            font-size: 13.5px;
            color: var(--color-text-secondary);
            border-bottom: 1px solid #F0F2F4;
        }

        .config-card .config-specs li:last-child {
            border-bottom: none;
        }

        .config-card .config-specs li i {
            color: var(--color-accent);
            font-size: 13px;
            width: 16px;
            text-align: center;
        }

        .config-card .config-specs li .spec-value {
            font-family: var(--font-mono);
            font-weight: 500;
            color: var(--color-text);
            margin-left: auto;
        }

        .param-list-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            transition: var(--transition);
            height: 100%;
        }

        .param-list-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(0,200,150,0.3);
        }

        .param-list-card .param-header {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 1rem;
        }

        .param-list-card .param-header i {
            color: var(--color-accent);
        }

        .param-list-card .param-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.55rem 0;
            font-size: 13.5px;
            color: var(--color-text-secondary);
            border-bottom: 1px solid #F0F2F4;
        }

        .param-list-card .param-item:last-child {
            border-bottom: none;
        }

        .param-list-card .param-item .param-value {
            font-family: var(--font-mono);
            font-weight: 600;
            color: var(--color-text);
            font-size: 13px;
        }

        .device-tag-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.25rem 1.5rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.9rem;
        }

        .device-tag-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(0,200,150,0.3);
        }

        .device-tag-card .device-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .device-tag-card .device-info {
            flex: 1;
            min-width: 0;
        }

        .device-tag-card .device-name {
            font-size: 14.5px;
            font-weight: 600;
            color: var(--color-text);
            margin: 0;
        }

        .device-tag-card .device-detail {
            font-size: 12.5px;
            color: var(--color-text-muted);
            margin: 0;
        }

        .device-tag-card .device-status {
            font-size: 12px;
            font-weight: 600;
            padding: 0.25rem 0.7rem;
            border-radius: 999px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .device-tag-card .device-status.ok {
            background-color: var(--color-accent-light);
            color: #008f6a;
        }

        .device-tag-card .device-status.basic {
            background-color: #FEF3C7;
            color: #B45309;
        }

        .device-tag-card .device-status.limited {
            background-color: #FEE2E2;
            color: #B91C1C;
        }

        .optimize-tip-item {
            display: flex;
            gap: 0.75rem;
            padding: 0.9rem 0;
            border-bottom: 1px solid #EAEDEF;
            align-items: flex-start;
        }

        .optimize-tip-item:last-child {
            border-bottom: none;
        }

        .optimize-tip-item .tip-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .optimize-tip-item .tip-text {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .optimize-tip-item .tip-text strong {
            color: var(--color-text);
            font-weight: 600;
        }

        .accordion-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            margin-bottom: 0.75rem;
        }

        .accordion-card:last-child {
            margin-bottom: 0;
        }

        .accordion-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.25rem;
            cursor: pointer;
            font-size: 14.5px;
            font-weight: 600;
            color: var(--color-text);
            transition: var(--transition);
            gap: 1rem;
            user-select: none;
        }

        .accordion-header:hover {
            background-color: #FAFBFC;
            color: var(--color-accent);
        }

        .accordion-header .accordion-arrow {
            color: var(--color-text-muted);
            transition: transform 0.25s ease;
            flex-shrink: 0;
            font-size: 13px;
        }

        .accordion-card.open .accordion-header .accordion-arrow {
            transform: rotate(180deg);
            color: var(--color-accent);
        }

        .accordion-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .accordion-card.open .accordion-body {
            max-height: 300px;
        }

        .accordion-body-inner {
            padding: 0 1.25rem 1.1rem;
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.8;
            background-color: #FAFBFC;
            border-top: 1px solid #F0F2F4;
            padding-top: 0.9rem;
        }

        .cta-panel {
            background-color: var(--color-primary);
            border-radius: var(--radius-card);
            padding: 2.25rem 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            flex-wrap: wrap;
        }

        .cta-panel .cta-info {
            flex: 1;
            min-width: 220px;
        }

        .cta-panel .cta-title {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 0.4rem;
            letter-spacing: -0.01em;
        }

        .cta-panel .cta-desc {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            margin: 0;
            line-height: 1.7;
        }

        .cta-panel .cta-actions {
            display: flex;
            gap: 0.75rem;
            flex-shrink: 0;
            flex-wrap: wrap;
        }

        .site-footer {
            background-color: var(--color-primary);
            color: #D1D5DB;
            padding: 3rem 0 1.5rem;
            border-top: 3px solid var(--color-accent);
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.9rem;
        }

        .site-footer .footer-brand .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            flex-shrink: 0;
        }

        .site-footer .footer-desc {
            font-size: 13.5px;
            color: rgba(255,255,255,0.6);
            line-height: 1.75;
            margin: 0;
        }

        .site-footer .footer-heading {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 0.9rem;
            letter-spacing: 0.02em;
        }

        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer ul li {
            margin-bottom: 0.5rem;
        }

        .site-footer ul li a {
            font-size: 13.5px;
            color: rgba(255,255,255,0.6);
            transition: var(--transition);
        }

        .site-footer ul li a:hover,
        .site-footer ul li a:focus {
            color: var(--color-accent);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            margin-top: 2rem;
            padding-top: 1.25rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem 1.5rem;
            font-size: 12.5px;
            color: rgba(255,255,255,0.45);
        }

        .footer-bottom span {
            white-space: nowrap;
        }

        .info-banner {
            background-color: var(--color-accent-light);
            border: 1px solid rgba(0,200,150,0.25);
            border-radius: var(--radius-card);
            padding: 1.25rem 1.5rem;
            display: flex;
            align-items: flex-start;
            gap: 0.9rem;
        }

        .info-banner .info-banner-icon {
            font-size: 18px;
            color: var(--color-accent);
            flex-shrink: 0;
            margin-top: 2px;
        }

        .info-banner .info-banner-text {
            font-size: 13.5px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        .info-banner .info-banner-text strong {
            color: var(--color-text);
            font-weight: 600;
        }

        @media (max-width: 1024px) {
            .category-banner .banner-title {
                font-size: 28px;
            }

            .section-title {
                font-size: 22px;
            }

            .nav-center {
                gap: 0.2rem;
            }

            .nav-item {
                padding: 0.5rem 0.55rem;
                font-size: 12.5px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 56px;
            }

            .nav-center {
                display: none;
            }

            .nav-status .status-text {
                display: none;
            }

            .hamburger {
                display: block;
            }

            .mobile-nav-panel {
                top: 56px;
            }

            .category-banner {
                padding: 2rem 0 1.75rem;
            }

            .category-banner .banner-title {
                font-size: 24px;
            }

            .category-banner .banner-subtitle {
                font-size: 14px;
            }

            .section-padding {
                padding: 2.5rem 0;
            }

            .section-padding-sm {
                padding: 1.75rem 0;
            }

            .section-title {
                font-size: 20px;
            }

            .metric-card .metric-value {
                font-size: 23px;
            }

            .chart-label {
                width: 70px;
                font-size: 12px;
            }

            .cta-panel {
                padding: 1.5rem 1.25rem;
                flex-direction: column;
                text-align: center;
            }

            .cta-panel .cta-actions {
                width: 100%;
                justify-content: center;
            }

            .site-footer {
                padding: 2rem 0 1rem;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                gap: 0.4rem;
            }
        }

        @media (max-width: 480px) {
            body {
                font-size: 14px;
            }

            .category-banner .banner-title {
                font-size: 20px;
            }

            .metric-card {
                padding: 1rem;
            }

            .metric-card .metric-value {
                font-size: 20px;
            }

            .chart-row {
                flex-direction: column;
                gap: 0.4rem;
                align-items: flex-start;
            }

            .chart-label {
                width: auto;
                text-align: left;
            }

            .chart-bar-wrap {
                width: 100%;
            }

            .btn-primary,
            .btn-accent,
            .btn-outline,
            .btn-warm {
                padding: 0.6rem 1.1rem;
                font-size: 12.5px;
                width: 100%;
                justify-content: center;
            }

            .cta-panel .cta-actions .button {
                width: 100%;
            }

            .device-tag-card {
                flex-wrap: wrap;
            }
        }

/* roulang page: category5 */
:root {
            --color-primary: #20232A;
            --color-accent: #00C896;
            --color-accent-warm: #F59E0B;
            --color-bg: #F5F7F8;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #4B5563;
            --color-text-muted: #7B8794;
            --color-border: #E4E7EB;
            --color-accent-light: #EAFAF5;
            --radius-card: 12px;
            --radius-button: 10px;
            --shadow-card: 0 1px 3px rgba(32,35,42,0.06);
            --shadow-card-hover: 0 6px 16px rgba(32,35,42,0.12);
            --transition: all 0.2s ease-in-out;
            --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover,
        a:focus {
            color: var(--color-accent-warm);
            text-decoration: none;
            outline: none;
        }

        a:focus-visible {
            outline: 3px solid rgba(0,200,150,0.45);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }

        button,
        .button {
            cursor: pointer;
            font-family: inherit;
            font-size: 14.5px;
            font-weight: 600;
            border-radius: var(--radius-button);
            transition: var(--transition);
            border: none;
            padding: 0.75rem 1.6rem;
            line-height: 1.6;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.02em;
        }

        button:focus-visible,
        .button:focus-visible {
            outline: 3px solid rgba(0,200,150,0.45);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        .section-padding {
            padding: 3.5rem 0;
        }

        .section-padding-sm {
            padding: 2.25rem 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 0.75rem;
        }

        .section-label::before {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
        }

        .section-title {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--color-text);
            margin: 0 0 1rem;
            letter-spacing: -0.01em;
        }

        .section-title .highlight {
            color: var(--color-accent);
        }

        .section-subtitle {
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text-secondary);
            margin: 0 0 2rem;
            max-width: 820px;
        }

        .text-muted {
            color: var(--color-text-muted);
        }
        .text-accent {
            color: var(--color-accent);
        }
        .text-warm {
            color: var(--color-accent-warm);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12.5px;
            font-weight: 600;
            padding: 0.3rem 0.75rem;
            border-radius: 999px;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .badge-warm {
            background-color: #FEF3C7;
            color: #B45309;
        }
        .badge-dark {
            background-color: var(--color-primary);
            color: #fff;
        }
        .badge-outline {
            background-color: transparent;
            border: 1px solid var(--color-border);
            color: var(--color-text-secondary);
        }

        /* Header / Navigation */
        .site-header {
            background-color: var(--color-primary);
            height: 64px;
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--color-accent);
            box-shadow: 0 2px 8px rgba(0,0,0,0.12);
        }

        .site-header .toolbar-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 1.25rem;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            text-decoration: none;
            transition: var(--transition);
        }

        .nav-logo:hover,
        .nav-logo:focus {
            color: var(--color-accent);
            text-decoration: none;
        }

        .nav-logo .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            flex-shrink: 0;
        }

        .nav-center {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            flex: 1;
            justify-content: center;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 13.5px;
            font-weight: 500;
            color: #D1D5DB;
            padding: 0.5rem 0.7rem;
            border-radius: 8px;
            transition: var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }

        .nav-item i {
            font-size: 13px;
        }

        .nav-item:hover,
        .nav-item:focus {
            color: var(--color-accent);
            background-color: rgba(0,200,150,0.08);
            text-decoration: none;
        }

        .nav-item.active {
            color: var(--color-accent);
            background-color: rgba(0,200,150,0.12);
            font-weight: 600;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 0.9rem;
        }

        .nav-status {
            display: flex;
            align-items: center;
            gap: 5px;
            font-size: 12.5px;
            color: #D1D5DB;
            white-space: nowrap;
        }

        .nav-status .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
        }

        .nav-bell {
            position: relative;
            color: #D1D5DB;
            font-size: 16px;
            display: flex;
            align-items: center;
            transition: var(--transition);
            text-decoration: none;
        }

        .nav-bell:hover {
            color: var(--color-accent-warm);
        }

        .nav-bell .bell-dot {
            position: absolute;
            top: -5px;
            right: -6px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent-warm);
            border: 2px solid var(--color-primary);
        }

        .nav-cta {
            background-color: var(--color-accent);
            color: #fff;
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius-button);
            font-size: 13.5px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-cta:hover {
            background-color: #00B386;
            color: #fff;
            text-decoration: none;
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 22px;
            cursor: pointer;
            padding: 0.4rem;
        }

        .mobile-menu {
            display: none;
            background-color: var(--color-primary);
            padding: 0.75rem 1.25rem 1.25rem;
            border-top: 1px solid rgba(255,255,255,0.06);
        }

        .mobile-menu .nav-item {
            display: flex;
            width: 100%;
            padding: 0.7rem 0.5rem;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            font-size: 14px;
        }

        /* Category Banner */
        .category-banner {
            background-color: var(--color-primary);
            padding: 2.5rem 0 2.25rem;
            border-bottom: 1px solid rgba(0,200,150,0.25);
            position: relative;
            overflow: hidden;
        }

        .category-banner::after {
            content: "";
            position: absolute;
            right: -80px;
            top: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(0,200,150,0.06);
            pointer-events: none;
        }

        .category-banner .container {
            position: relative;
            z-index: 1;
        }

        .category-banner h1 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 0.75rem;
            letter-spacing: -0.01em;
            line-height: 1.35;
        }

        .category-banner p {
            font-size: 15px;
            color: #B7C0CC;
            margin: 0;
            max-width: 680px;
            line-height: 1.8;
        }

        .banner-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: #8B97A3;
            margin-bottom: 1rem;
        }

        .banner-breadcrumb a {
            color: var(--color-accent);
            text-decoration: none;
        }

        .banner-breadcrumb a:hover {
            color: var(--color-accent-warm);
        }

        .banner-breadcrumb span {
            color: #8B97A3;
        }

        /* Timeline Section */
        .timeline-wrap {
            position: relative;
            padding-left: 28px;
        }

        .timeline-wrap::before {
            content: "";
            position: absolute;
            left: 11px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            background: var(--color-border);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 1.5rem;
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .timeline-item::before {
            content: "";
            position: absolute;
            left: -23px;
            top: 18px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-accent);
            border: 2px solid #fff;
            box-shadow: 0 0 0 2px var(--color-accent);
            z-index: 1;
        }

        .timeline-item.older::before {
            background-color: var(--color-text-muted);
            box-shadow: 0 0 0 2px var(--color-text-muted);
        }

        .timeline-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.25rem 1.5rem;
            transition: var(--transition);
        }

        .timeline-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(0,200,150,0.3);
        }

        .timeline-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 0.6rem;
        }

        .timeline-version {
            font-family: var(--font-mono);
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: 0.01em;
        }

        .timeline-date {
            font-size: 12.5px;
            color: var(--color-text-muted);
            font-family: var(--font-mono);
        }

        .timeline-changes {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .timeline-changes li {
            font-size: 14px;
            color: var(--color-text-secondary);
            padding: 0.3rem 0 0.3rem 1.25rem;
            position: relative;
            line-height: 1.7;
        }

        .timeline-changes li::before {
            content: "—";
            position: absolute;
            left: 0;
            color: var(--color-accent);
            font-weight: 600;
        }

        /* Cards and Grid */
        .info-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            height: 100%;
            transition: var(--transition);
        }

        .info-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .info-card h3 {
            font-size: 16.5px;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 0.5rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .info-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin: 0;
            line-height: 1.75;
        }

        .stat-block {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 1.25rem 1.5rem;
            text-align: center;
            transition: var(--transition);
        }

        .stat-block:hover {
            box-shadow: var(--shadow-card-hover);
        }

        .stat-number {
            font-family: var(--font-mono);
            font-size: 26px;
            font-weight: 700;
            color: var(--color-accent);
            letter-spacing: -0.01em;
        }

        .stat-label {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: 0.25rem;
        }

        /* Version summary table alternative */
        .version-compare {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .version-compare-row {
            display: flex;
            align-items: stretch;
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .version-compare-row:last-child {
            border-bottom: none;
        }

        .version-compare-row:hover {
            background-color: #FAFBFC;
        }

        .vc-version {
            flex: 0 0 140px;
            padding: 1rem 1.25rem;
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 14.5px;
            color: var(--color-text);
            border-right: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            background: #F9FAFB;
        }

        .vc-detail {
            flex: 1;
            padding: 1rem 1.25rem;
            font-size: 14px;
            color: var(--color-text-secondary);
            display: flex;
            align-items: center;
            line-height: 1.7;
        }

        .vc-status {
            flex: 0 0 100px;
            padding: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Resource links */
        .resource-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .resource-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0.6rem 0;
            border-bottom: 1px solid var(--color-border);
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        .resource-list li:last-child {
            border-bottom: none;
        }

        .resource-list i {
            color: var(--color-accent);
            width: 18px;
            text-align: center;
            flex-shrink: 0;
        }

        /* Notice list */
        .notice-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .notice-list li {
            padding: 0.5rem 0 0.5rem 1.75rem;
            position: relative;
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        .notice-list li::before {
            content: "\f06a";
            position: absolute;
            left: 0;
            top: 0.55rem;
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--color-accent-warm);
            font-size: 13px;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            color: #B7C0CC;
            padding: 3rem 0 1.5rem;
            border-top: 1px solid rgba(0,200,150,0.2);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .footer-brand .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            flex-shrink: 0;
        }

        .footer-desc {
            font-size: 13.5px;
            line-height: 1.8;
            color: #8B97A3;
            margin: 0;
        }

        .footer-heading {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 0.75rem;
            letter-spacing: 0.02em;
        }

        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .site-footer ul li {
            margin-bottom: 0.4rem;
        }

        .site-footer ul li a {
            color: #8B97A3;
            text-decoration: none;
            font-size: 13.5px;
            transition: var(--transition);
        }

        .site-footer ul li a:hover {
            color: var(--color-accent);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1rem;
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 12.5px;
            color: #6B7683;
        }

        .footer-bottom span {
            white-space: nowrap;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-center {
                gap: 0.15rem;
            }
            .nav-item {
                font-size: 12.5px;
                padding: 0.5rem 0.5rem;
            }
            .nav-item i {
                font-size: 11.5px;
            }
            .category-banner h1 {
                font-size: 28px;
            }
            .vc-version {
                flex: 0 0 110px;
                font-size: 13.5px;
            }
        }

        @media (max-width: 768px) {
            .nav-center {
                display: none;
            }
            .nav-right {
                gap: 0.5rem;
            }
            .nav-status {
                display: none;
            }
            .nav-cta {
                font-size: 12.5px;
                padding: 0.4rem 0.8rem;
            }
            .hamburger {
                display: flex;
                align-items: center;
            }
            .mobile-menu {
                display: block;
            }
            .mobile-menu.hidden {
                display: none;
            }
            .category-banner {
                padding: 2rem 0 1.75rem;
            }
            .category-banner h1 {
                font-size: 24px;
            }
            .category-banner p {
                font-size: 13.5px;
            }
            .timeline-wrap {
                padding-left: 22px;
            }
            .timeline-wrap::before {
                left: 8px;
            }
            .timeline-item::before {
                left: -19px;
                top: 14px;
                width: 8px;
                height: 8px;
            }
            .timeline-card {
                padding: 1rem 1.1rem;
            }
            .timeline-card-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.2rem;
            }
            .vc-version {
                flex: 0 0 90px;
                font-size: 12.5px;
                padding: 0.75rem 0.85rem;
            }
            .vc-detail {
                padding: 0.75rem 0.85rem;
                font-size: 13px;
            }
            .vc-status {
                flex: 0 0 72px;
                padding: 0.5rem;
            }
            .section-title {
                font-size: 21px;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 14px;
            }
            .category-banner h1 {
                font-size: 20px;
            }
            .category-banner p {
                font-size: 13px;
            }
            .nav-cta {
                font-size: 11.5px;
                padding: 0.35rem 0.6rem;
                gap: 4px;
            }
            .timeline-card {
                padding: 0.85rem 0.9rem;
            }
            .timeline-version {
                font-size: 14.5px;
            }
            .timeline-changes li {
                font-size: 13px;
                padding-left: 1rem;
            }
            .version-compare-row {
                flex-wrap: wrap;
            }
            .vc-version {
                flex: 0 0 100%;
                border-right: none;
                border-bottom: 1px solid var(--color-border);
                padding: 0.6rem 0.85rem;
            }
            .vc-detail {
                flex: 0 0 100%;
                padding: 0.6rem 0.85rem;
            }
            .vc-status {
                flex: 0 0 100%;
                padding: 0.5rem 0.85rem;
                justify-content: flex-start;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.35rem;
            }
        }

/* roulang page: category6 */
:root {
            --color-primary: #20232A;
            --color-accent: #00C896;
            --color-accent-warm: #F59E0B;
            --color-bg: #F5F7F8;
            --color-card: #FFFFFF;
            --color-text: #1F2933;
            --color-text-secondary: #4B5563;
            --color-text-muted: #7B8794;
            --color-border: #E4E7EB;
            --color-accent-light: #EAFAF5;
            --radius-card: 12px;
            --radius-button: 10px;
            --shadow-card: 0 1px 3px rgba(32,35,42,0.06);
            --shadow-card-hover: 0 6px 16px rgba(32,35,42,0.12);
            --transition: all 0.2s ease-in-out;
            --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover,
        a:focus {
            color: var(--color-accent-warm);
            text-decoration: none;
            outline: none;
        }

        a:focus-visible {
            outline: 3px solid rgba(0, 200, 150, 0.45);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }

        button,
        .button {
            cursor: pointer;
            font-family: inherit;
            font-size: 14.5px;
            font-weight: 600;
            border-radius: var(--radius-button);
            transition: var(--transition);
            border: none;
            padding: 0.75rem 1.6rem;
            line-height: 1.6;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.02em;
            text-decoration: none;
        }

        button:focus-visible,
        .button:focus-visible {
            outline: 3px solid rgba(0, 200, 150, 0.45);
            outline-offset: 2px;
        }

        .button-primary {
            background-color: var(--color-primary);
            color: #fff;
        }

        .button-primary:hover,
        .button-primary:focus {
            background-color: var(--color-accent);
            color: #fff;
        }

        .button-secondary {
            background-color: transparent;
            color: var(--color-accent);
            border: 1px solid var(--color-accent);
        }

        .button-secondary:hover,
        .button-secondary:focus {
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            border-color: var(--color-accent);
        }

        .button-accent {
            background-color: var(--color-accent);
            color: #fff;
        }

        .button-accent:hover,
        .button-accent:focus {
            background-color: var(--color-primary);
            color: #fff;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        .section-padding {
            padding: 4rem 0;
        }

        .section-padding-sm {
            padding: 2.5rem 0;
        }

        .section-padding-xs {
            padding: 1.5rem 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 0.75rem;
        }

        .section-label::before {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-text);
            margin: 0 0 1rem;
            letter-spacing: -0.01em;
        }

        .section-title .highlight {
            color: var(--color-accent);
        }

        .section-subtitle {
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text-secondary);
            margin: 0 0 2rem;
            max-width: 780px;
        }

        .text-muted {
            color: var(--color-text-muted);
        }

        .text-accent {
            color: var(--color-accent);
        }

        .text-warm {
            color: var(--color-accent-warm);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12.5px;
            font-weight: 600;
            padding: 0.3rem 0.75rem;
            border-radius: 999px;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .badge-warm {
            background-color: #FEF3C7;
            color: #B45309;
        }

        .badge-dark {
            background-color: var(--color-primary);
            color: #fff;
        }

        .badge-outline {
            background-color: transparent;
            color: var(--color-text-secondary);
            border: 1px solid var(--color-border);
        }

        .card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            padding: 1.5rem;
        }

        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .accordion-faq {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .accordion-faq .accordion-item {
            border-bottom: 1px solid var(--color-border);
        }

        .accordion-faq .accordion-item:last-child {
            border-bottom: none;
        }

        .accordion-faq .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.25rem;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            background-color: var(--color-card);
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 1rem;
        }

        .accordion-faq .accordion-title:hover {
            background-color: #F9FAFB;
            color: var(--color-accent);
        }

        .accordion-faq .accordion-title .chevron {
            font-size: 14px;
            color: var(--color-text-muted);
            transition: transform 0.25s ease;
            flex-shrink: 0;
        }

        .accordion-faq .accordion-content {
            padding: 0 1.25rem 1rem;
            color: var(--color-text-secondary);
            font-size: 14.5px;
            line-height: 1.8;
            background-color: #FAFBFC;
        }

        .trouble-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            margin-bottom: 1rem;
            overflow: hidden;
        }

        .trouble-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: #D1D5DB;
        }

        .trouble-card .trouble-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.25rem;
            cursor: pointer;
            gap: 1rem;
            transition: var(--transition);
            background-color: var(--color-card);
        }

        .trouble-card .trouble-header:hover {
            background-color: #F9FAFB;
        }

        .trouble-card .trouble-header .trouble-title {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14.5px;
            font-weight: 600;
            color: var(--color-text);
            flex: 1;
            min-width: 0;
        }

        .trouble-card .trouble-header .trouble-title i {
            color: var(--color-accent-warm);
            font-size: 15px;
            flex-shrink: 0;
        }

        .trouble-card .trouble-header .chevron {
            font-size: 13px;
            color: var(--color-text-muted);
            transition: transform 0.25s ease;
            flex-shrink: 0;
        }

        .trouble-card .trouble-body {
            padding: 0 1.25rem 1.25rem;
            border-top: 1px solid var(--color-border);
            background-color: #FAFBFC;
        }

        .trouble-card .trouble-body .symptom {
            font-size: 13.5px;
            color: var(--color-text-muted);
            margin-bottom: 0.65rem;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .trouble-card .trouble-body .symptom i {
            font-size: 12px;
            color: var(--color-accent);
        }

        .trouble-card .trouble-body .steps {
            list-style: none;
            margin: 0;
            padding: 0;
            counter-reset: step-counter;
        }

        .trouble-card .trouble-body .steps li {
            counter-increment: step-counter;
            position: relative;
            padding-left: 2rem;
            margin-bottom: 0.5rem;
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.75;
        }

        .trouble-card .trouble-body .steps li::before {
            content: counter(step-counter);
            position: absolute;
            left: 0;
            top: 0.15rem;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background-color: var(--color-accent-light);
            color: var(--color-accent);
            font-size: 12px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-mono);
        }

        .tip-strip {
            background-color: #FFF8E6;
            border-left: 4px solid var(--color-accent-warm);
            border-radius: 0 8px 8px 0;
            padding: 1rem 1.25rem;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: #7A5D00;
            line-height: 1.75;
        }

        .tip-strip i {
            color: var(--color-accent-warm);
            font-size: 15px;
            margin-top: 3px;
            flex-shrink: 0;
        }

        .check-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 0.6rem 0;
            font-size: 14px;
            color: var(--color-text-secondary);
            border-bottom: 1px dashed var(--color-border);
            line-height: 1.7;
        }

        .check-list li:last-child {
            border-bottom: none;
        }

        .check-list li i {
            color: var(--color-accent);
            font-size: 14px;
            margin-top: 4px;
            flex-shrink: 0;
        }

        .info-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1rem;
        }

        .info-item {
            background-color: #F9FAFB;
            border: 1px solid var(--color-border);
            border-radius: 8px;
            padding: 1rem 1.25rem;
            font-size: 13.5px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        .info-item .info-label {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-text-muted);
            letter-spacing: 0.045em;
            margin-bottom: 0.25rem;
            text-transform: uppercase;
        }

        .info-item .info-value {
            font-family: var(--font-mono);
            font-size: 13.5px;
            color: var(--color-text);
            word-break: break-all;
        }

        .step-horizontal {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            counter-reset: step-h;
        }

        .step-h {
            flex: 1;
            min-width: 150px;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 1.25rem 1.25rem 1rem;
            position: relative;
            counter-increment: step-h;
            transition: var(--transition);
        }

        .step-h:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: #D1D5DB;
        }

        .step-h::before {
            content: counter(step-h);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--color-accent);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            font-family: var(--font-mono);
            margin-bottom: 0.75rem;
        }

        .step-h .step-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 0.35rem;
        }

        .step-h .step-desc {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        .related-entry {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.85rem 1rem;
            background-color: #FAFBFC;
            border: 1px solid var(--color-border);
            border-radius: 8px;
            transition: var(--transition);
            text-decoration: none;
            color: var(--color-text);
        }

        .related-entry:hover {
            border-color: var(--color-accent);
            background-color: var(--color-accent-light);
            color: var(--color-text);
            transform: translateX(4px);
        }

        .related-entry i {
            font-size: 16px;
            color: var(--color-accent);
            flex-shrink: 0;
        }

        .related-entry .related-info {
            flex: 1;
            min-width: 0;
        }

        .related-entry .related-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
        }

        .related-entry .related-desc {
            font-size: 12.5px;
            color: var(--color-text-muted);
        }

        .related-entry .arrow {
            font-size: 13px;
            color: var(--color-text-muted);
            flex-shrink: 0;
        }

        .feedback-box {
            background-color: #F0FDF7;
            border: 1px solid #A7F3D0;
            border-radius: var(--radius-card);
            padding: 1.75rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            flex-wrap: wrap;
        }

        .feedback-box .feedback-text {
            flex: 1;
            min-width: 260px;
        }

        .feedback-box .feedback-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 0.35rem;
        }

        .feedback-box .feedback-desc {
            font-size: 13.5px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        .feedback-box .button {
            flex-shrink: 0;
        }

        .page-banner {
            background-color: var(--color-primary);
            border-radius: var(--radius-card);
            overflow: hidden;
            display: flex;
            align-items: stretch;
            gap: 0;
            margin-top: 2rem;
        }

        .page-banner .banner-text {
            flex: 1.2;
            padding: 2.5rem 2rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .page-banner .banner-text h1 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin: 0 0 0.75rem;
            letter-spacing: -0.01em;
        }

        .page-banner .banner-text .banner-sub {
            font-size: 15px;
            color: #D1D5DB;
            line-height: 1.8;
            margin: 0;
            max-width: 560px;
        }

        .page-banner .banner-text .banner-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-top: 1.25rem;
            flex-wrap: wrap;
        }

        .page-banner .banner-image {
            flex: 0.8;
            min-height: 260px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .page-banner .banner-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, var(--color-primary) 0%, rgba(32, 35, 42, 0.35) 35%, rgba(32, 35, 42, 0.05) 100%);
        }

        .site-header {
            background-color: var(--color-primary);
            height: 64px;
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--color-accent);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
        }

        .site-header .toolbar-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 1.25rem;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            text-decoration: none;
            transition: var(--transition);
        }

        .nav-logo:hover,
        .nav-logo:focus {
            color: var(--color-accent);
            text-decoration: none;
        }

        .nav-logo .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            flex-shrink: 0;
        }

        .nav-center {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            flex: 1;
            justify-content: center;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        .nav-center::-webkit-scrollbar {
            display: none;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 13.5px;
            font-weight: 500;
            color: #D1D5DB;
            padding: 0.5rem 0.7rem;
            border-radius: 8px;
            transition: var(--transition);
            white-space: nowrap;
            text-decoration: none;
            flex-shrink: 0;
        }

        .nav-item i {
            font-size: 13px;
            opacity: 0.85;
        }

        .nav-item:hover,
        .nav-item:focus {
            color: var(--color-accent);
            background-color: rgba(255, 255, 255, 0.06);
        }

        .nav-item.active {
            color: var(--color-accent);
            background-color: rgba(0, 200, 150, 0.1);
            font-weight: 600;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }

        .nav-status {
            display: flex;
            align-items: center;
            gap: 5px;
            font-size: 12.5px;
            color: #D1D5DB;
            white-space: nowrap;
        }

        .nav-status .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
            flex-shrink: 0;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.5;
            }
        }

        .nav-bell {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            color: #D1D5DB;
            font-size: 15px;
            transition: var(--transition);
            cursor: default;
            flex-shrink: 0;
        }

        .nav-bell:hover {
            color: var(--color-accent);
            background-color: rgba(255, 255, 255, 0.06);
        }

        .nav-bell .bell-dot {
            position: absolute;
            top: 5px;
            right: 5px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background-color: var(--color-accent-warm);
        }

        .nav-cta {
            background-color: var(--color-accent);
            color: #fff;
            border-radius: var(--radius-button);
            padding: 0.5rem 1rem;
            font-size: 13px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            white-space: nowrap;
            transition: var(--transition);
            border: none;
            text-decoration: none;
        }

        .nav-cta:hover,
        .nav-cta:focus {
            background-color: var(--color-primary);
            color: #fff;
        }

        .nav-cta i {
            font-size: 12px;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 20px;
            padding: 0.5rem;
            cursor: pointer;
            border-radius: 6px;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            color: var(--color-accent);
            background-color: rgba(255, 255, 255, 0.06);
        }

        .mobile-menu {
            display: none;
            background-color: var(--color-primary);
            border-top: 1px solid rgba(0, 200, 150, 0.3);
            padding: 0.75rem 1.25rem;
        }

        .mobile-menu .nav-item {
            display: flex;
            padding: 0.7rem 0.5rem;
            font-size: 14px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 0;
            width: 100%;
        }

        .mobile-menu .nav-item:last-child {
            border-bottom: none;
        }

        .site-footer {
            background-color: var(--color-primary);
            color: #D1D5DB;
            padding: 3rem 0 1.5rem;
            margin-top: 2rem;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .site-footer .footer-brand .logo-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background-color: var(--color-accent);
            display: inline-block;
        }

        .site-footer .footer-desc {
            font-size: 13.5px;
            color: #9CA3AF;
            line-height: 1.8;
            margin: 0;
        }

        .site-footer .footer-heading {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 0.85rem;
            letter-spacing: 0.03em;
        }

        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .site-footer ul li {
            margin-bottom: 0.5rem;
        }

        .site-footer ul li a {
            font-size: 13px;
            color: #9CA3AF;
            transition: var(--transition);
            text-decoration: none;
        }

        .site-footer ul li a:hover {
            color: var(--color-accent);
        }

        .site-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
            padding-top: 1.5rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 12.5px;
            color: #9CA3AF;
        }

        .site-footer .footer-bottom span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        @media (max-width: 1024px) {
            .page-banner .banner-text h1 {
                font-size: 27px;
            }

            .page-banner .banner-image {
                min-height: 220px;
            }

            .nav-center {
                gap: 0.15rem;
            }

            .nav-item {
                font-size: 12.5px;
                padding: 0.45rem 0.55rem;
            }

            .nav-cta {
                padding: 0.45rem 0.75rem;
                font-size: 12px;
            }
        }

        @media (max-width: 768px) {
            .nav-center {
                display: none;
            }

            .nav-right .nav-status,
            .nav-right .nav-bell {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-menu {
                display: block;
            }

            .mobile-menu.hidden {
                display: none;
            }

            .site-header {
                height: 60px;
            }

            .page-banner {
                flex-direction: column;
            }

            .page-banner .banner-text {
                padding: 1.75rem 1.25rem;
            }

            .page-banner .banner-text h1 {
                font-size: 23px;
            }

            .page-banner .banner-image {
                min-height: 180px;
                order: -1;
            }

            .page-banner .banner-image::after {
                background: linear-gradient(180deg, rgba(32, 35, 42, 0.1) 60%, var(--color-primary) 100%);
            }

            .info-grid {
                grid-template-columns: 1fr;
            }

            .step-horizontal {
                flex-direction: column;
            }

            .step-h {
                min-width: auto;
            }

            .feedback-box {
                flex-direction: column;
                align-items: stretch;
                text-align: left;
            }

            .feedback-box .button {
                align-self: flex-start;
            }

            .section-padding {
                padding: 2.5rem 0;
            }

            .section-padding-sm {
                padding: 1.75rem 0;
            }

            .section-title {
                font-size: 21px;
            }

            .site-footer {
                padding: 2rem 0 1rem;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.35rem;
            }

            .trouble-card .trouble-header {
                padding: 0.9rem 1rem;
            }

            .trouble-card .trouble-body {
                padding: 0 1rem 1rem;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 14px;
            }

            .nav-logo {
                font-size: 16px;
            }

            .container {
                padding: 0 0.9rem;
            }

            .page-banner .banner-text h1 {
                font-size: 20px;
            }

            .page-banner .banner-text .banner-sub {
                font-size: 13.5px;
            }

            .page-banner .banner-image {
                min-height: 150px;
            }

            .section-title {
                font-size: 19px;
            }

            .button {
                padding: 0.7rem 1.2rem;
                font-size: 13.5px;
            }

            .card {
                padding: 1.1rem;
            }

            .trouble-card .trouble-header .trouble-title {
                font-size: 13.5px;
                gap: 7px;
            }

            .trouble-card .trouble-header .chevron {
                font-size: 11px;
            }

            .feedback-box {
                padding: 1.25rem;
            }

            .badge {
                font-size: 11.5px;
                padding: 0.25rem 0.6rem;
            }
        }